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Reviews for SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)



 SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)

Product Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
Current Rating: 4.97 out of 5 stars
Votes & Reviews: 1010 vote(s) and 1476 user reviews.


A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Drew: space

I would buy this product and use it in every car I own

I own 2003 s2000 that I recently rebuilt the cylinder head on. Prior to the rebuild the car was turboed for a decent amount of time. The car currently sits around 112k miles at the moment after the rebuild. The car has been running Amsoil signature series for most of its life. When I inspected the camshaft, cylinder walls, etc during the rebuild the car showed absolutely no sign of wear anywhere and this is after being turboed and ran hard for a decent amount of time. I moved back to 10w30 signature series after the rebuild but still great stuff.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Shimmy: space

ONLY Amsoil!

I've taken several engines apart but only engines that have run Amsoil and they only need coolant system work. Conventional oil precipitates out garbage and sludges up engines resulting in CLOGGED oil passages. If your switching from conventional, get the best protection you can get that has tons of positive history. Do your homework/research to understand ALL the costs involved. You will determine Amsoil is the best switch you can make for your vehicles.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Railrunner: space

A Trusted Product

I have been using Amsoil products in my vehicles and motorized equipment for many years and relay on its quality. As a "gearhead", I know how important using quality motor oils and greases are to machinery. They are my first choice for lubrication fluids.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by K-Mac: space

Only the BEST Oils for my vehicles

I only use American AMSOIL in all my vehicles. For this one, I use it in my 2005 Honda Fit 1500cc..

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by K-Mac: space

Only American

I only use American AMSOIL in all my vehicles. For this one, I use it in my 2016 Nissan Caravan NV350.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff: space

Great product

I run Amsoil oil and filter in my Yukon Denali 15,000 miles between changes. Just reset the change oil message at 7500. Doing this for years with several GMC Yukon's. At 250,000 plus miles no oil burn at all. Very impressed with not having to go under the car twice as much.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and
submitted their review through a specific process that tracks purchase history.Reviewed by Ricky: space

Best oil you can buy

Awesome cold start protection, and anti-wear lube, simply the best

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mustang Larry: space

Buy again

So far all is good.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mustang Larry: space

I will buy this product again.

Why is it when I change my oil does my mileage drop by 2mpg. For the first 400 miles 1 1/2 to 2 mpg less then it creeps back up.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ron the Tyrolian: space

Great products

I have relied on Amsoil products for years to protect my engines and it has done exactly that.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by SamLac: space

Why change?

I started using AMSoil in the mid 80s while in Alaska. Cold extreme make lubrication very critical. At minus 40, most petroleum lubes won't even drip off the dip stick and when started cold you can hear every bearing in the engine as there is little or no lube flowing. No so with my AMSoil.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff: space

Not worth it.

I've been running 5W30 Signature Series in my 2002 Tacoma since putting it on the road in 2016 with 116,000 miles on the engine. I have since had Oil Analyzers (Amsoil, Inc.) test three samples from the truck so far, and have yet to have the oil last more than 13K miles before being told it's time for it to be changed. So much for the 25,000 miles/1 year claim...

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Grizz: space

This stuff is THE BEST!

I have 2 vehicles that have had this oil in them (changed every 15,000mi) since I bought them new. They both have mileage approaching 250,000, and they run like BRAND NEW. My newest vehicle is a 2017 Subie Forester Turbo so it gets Signature 5W-30 every 10,000 miles, and I'm sure it will see 200k and beyond.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a
specific process that tracks purchase history.Reviewed by GF1563: space

Great product, well worth the money

Love the extended oil change intervals and my fuel mileage increased slightly, which leads me to believe it must be lubricating everything very well.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pat: space

This is the only oil I will put in my engine

It's great year round hot or cold

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Don: space

Will Always use Amsoil

Several years ago I switched to Amsoil in my GMC Yukon. I was very impressed with what the Signature Series 5w-30 Motor Oil looked like after the first oil change. With all the oils and products that Amsoil offers, I have since switched everything I own over to Amsoil. Even my lawnmowers.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by dhgguy: space

I can recommend this product

Used in my F150 exclusively. Excellent oil & filter.
Would not use anything else.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that
tracks purchase history.Reviewed by Ronv: space

Great product!

I have used Amsoil for 30 years and wouldn't think of using any other oil.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mister nice: space

Yes

Love that you don't have to change oil as offer as regular oil. Is is a little high. Hey but you get what you pay for.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Henry: space

Good stuff

I use Amsoil exclusively

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jblev77: space

The best synthetic oil

#1 for 3.5L ecoboost

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ed: space

This is the only oil I run in my Silverado Cobalt, and GTO

I like being about to change oil at any time between 5-10k and not have to worry about weather or not the oil is doing it job !!!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by RebelnOhio: space

Amsoil always works!

I have been using Amsoil for over 15 years and have never had a problem, it's a well proven product that I trust in all of my cars for work and for pleasure. I will will continue to use Amsoil and benefit from it's proven results! I own a Livery/Limo Service and I drive about 40-50K miles a year on various cars and I believe Amsoil is the best Oil for all of my vehicles. With the long 15k Mile change intervals it is a money saving gem and your engine benefits 100%. I recommend there products highly!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by KENT: space

SIGNATURE SERIES SYNTHETIC MOTOR OIL

I've used this brand and series in my Dodge Ram 4.7 v-8 since I acquired it at 90,000 miles. I've driven another 70,000 miles since and the engine is stronger than it's ever been! I expect to drive this truck until at least 300K miles because of the Amsoil Signagture Series Synthetic brand motor oil. I won't use anything else!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by KK: space

Great Stuff

I use Amsoil on my SUV and love it!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks
purchase history.Reviewed by Tom: space

Great Oil

I use ansoil on all of my trucks, motorcycles, ATVs. This oil I use on 2017 Hemi 2500. It cannot be beat.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by G: space

I love it

Instant satisfaction, after the first start up i could already hear and feel things running smoother.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Redtundra8: space

Great Oil

This is the best oil money can buy in my opinion. I use this in all my vehicles and have for the last 12 years. Love only having to change the oil once a year. I highly recommend this product.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pat: space

Best line out there

Bestboil products on the market by far. I run it in all my vehicles

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Billy G: space

No issues

I have used Amsoil products for many years in all of my vehicles and small engines. I have never had an issues. I recommend Amsoil even though it is not the cheapest but the delivery is very prompt.

Item Reviewed: Signature Series Motor Oils
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Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Wingsprnt: space

Does what it promises.

Not sure about the oW-20 weight here in Florida, but that is what Honda calls for.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Greg: space

Good product

Always met my expectations.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by MatsB: space

Excellent products.

Using Amsoil in all of my family's cars. Using Signature series in cars that drive over 12,000 miles per year, and XL series in cars that drive less than 12,000 miles.
Sent a 27,000 mile sample for testing to a independent lab, and they recommended 30,000 miles next time based on the excellent results.
Also using Amsoil in all lawn equipment and for a standby generator.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Robert Long: space

I would definitely buy this product again

Great product gives better fuel mileage and cleaner oil after changes

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the
reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tim: space

The Best There Is

I've been using Amsoil since the 1980s in everything with an engine. And have bragged about it's benefits to anyone who'd listen.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rob: space

Increase mileage

I get better mileage with Amsoil
I run my 4x4 very hard and Amsoil is doing a great job of keeping it running strong

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Elvis of Aragorn: space

Great results

My 2004 Silverado (5.3L V8) has had a steady diet of Amsoil since its second oil change. I have stuck to the 10,000 mile interval, using Amsoil Ea filters & Signature Oil. She's about to roll over the 200,000 mile mark, and I have had no engine issues. I use Amsoil Signature Synthetic Oil in all of my vehicles, and plan on keeping it that way.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pinto: space

great in the city

I'm city driving in a 4x4 Ford van and after my last oil change the oil was still in great condition after 15,000 miles. just used the cleaning solution so lets see how this improves engine longevity. really happy with all th products I have received.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by S2kadi: space

The Only Oil I Trust

I use Amsoil Signature Series in both of my cars that are susceptible to burning oil. The 10W30 goes into my Honda S2000 and works great! Amsoil is the only oil I use in my motors and gearboxes, after trying out several different brands, I have found their quality to be of the best.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by pro4100: space

Top Notch

I use it in my Subie Forester and my silverado 1500. no problems ever!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Quick charge water: space

Best stuff on the market

Yeah like to 25,000 my old changed

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific
process that tracks purchase history.Reviewed by Beast: space

10K Oil Changes

I will never use conventional again. 10K mile Oil changes, or once a year. You cant beat the quality and value of this product. No dealer or mechanic can ever persuade my to change every 3k miles again!. Get you some!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ber: space

I always use only Amsoil

Better mpg and engine protection

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ScoobyVTEC: space

Improved MPG

Bought Amsoil for all of my cars so I wouldn't have to change the oil so frequently and for the protection it gives all of the internal moving parts. I've noticed an increase in MPG and smoothness when I drive.
2017 Civic Type R
2012 Pilot Touring AWD
1998 Civic EX

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mark: space

Best product

Started using in my 08 Subaru saw better gas milage the car ran smoother so I began to change ever gas engines l own to amsoil. Couldn't ask for a better product !!!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jim 38: space

The best money can buy

I've used amsoll since probably 1990 in my mowers my pickups my tractors. I swear by the signature series it's done wonders for me and Increased gas mileage you have to try it for yourself to see the picture

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by BC: space

Oil of choice for my rotary.

I've been running this oil in my Mazda for a few years now and even after a full oil change interval and heat a rotary produces it still looks very clean

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Adam A: space

Never switching back to motorcraft now.

I have started to use this product on my 99 town car a few months ago and I have already seen a difference in just how to engine stays cooler and is able to drive a lot smoother. I would definitely recommend this to anyone wanting a better lubricant for their engine and to have better performance out of anything they have.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Carp: space

No competition

Other oils just wouldn't hold up. Would burn off and be black by 1,000 miles. I have work trucks, daily drivers, and toys. Work as a technician and never seen oil drain clean after a normal service. Except Amsoil after 10k looks good as new.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mackjash: space

Only oil I use!

Amsoil have provided my street and race motorcycles with excellent protection. Recently tore down my old race bike which has 30,000 miles on it of which 7000 are track use. Measuring all major parts and the engine shows no wear, factory cross hatch is highly visible in the cylinders. Great product!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific
process that tracks purchase history.Reviewed by jmcamp: space

The only products...

I use all Amsoil products in all my vehicles and yard equipment. I even have them change it on my Volvo XC60 that is under warranty, where they recommend and use another product. I always tell them to use the Amsoil oil I bring instead.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Trigger: space

Best oil I've tested to date!

AMS Oil's Signature Series oil has been the best oil I've tried so far. It has been cleaner from oil change to oil change compared to synthetic oils from NAPA, Valvoline, Royal Purple, Mobile One, and Castrol, and I've seen fewer metal shavings comparatively to many of the aforementioned oils. Royal Purple was the only comparable oil heat wise but it's generally dirtier between changes and more expensive.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mac: space

230k miles - and still like new

I have a 1998 Chevy Suburban with 230k miles. Its whole life has been 100% Signature AmsOil. The motor still has 155-160 compression in all cylinders. It still gets "like new" gas mileage. It still pulls trailers like they aren't there. Simply impressive.

Oil changes every 10k miles (since I pull trailers). Compared to conventional oil every 5k, it is breakeven in total cost - (after discount from AmsOil). PLUS - I only change the oil 3x per year instead of 6x. In fact, I love the fact I can change oil in fall and not again until spring. Skip right through winter.

AmsOil products are worth every penny.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by trey512001: space

signature series

great product and now a longer interval change at a fair price. what else could you want !

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Andy: space

Good stuff

I put this in my 1996 Chevy K1500 with a 5.7. Slight tapping on startup disappeared, and i gained about half a mile per gallon. Not bad for a motor with 200k on it. Always happy with all Amsoil products, it's all I run.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Anthony: space

Love my amsoil

Simply the best bang for the buck. I have oil analysis to back it up.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Carb: space

Awesome!

Hands down the best oil on the market! Will never go back to the other stuff.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Postman: space

👍

Use it in all my vehicles. I beleive ya the only way to go

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Postman: space

Use it in all my vehicles. I beleive ya the only way to go

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by TAK: space

I recommend this product

Been using Amsoil for 20 years and never had any engine problems.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the
reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by TNMrK: space

Great product

I have used this oil in both my personal vehicles 2012 Silverado and 2011 BMW and they run super smooth with this oil. I will not run anything else. When I work on a customer engine I put Amsoil in and recommend it for life.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Gordy: space

Best Synthetic oil around

I always use Amsoil in my vehicles and have had outstanding performance from it

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jagger: space

Happy with purchase

I can only speak honestly and being that I just acquired the vehicle I changed the oil and transmission fluid recently to Amsoil. Both products seem fine but I cannot really say that they made any noticeable improvement in mileage or smoothness or anything else however I'm hoping they do provide the protection I'm looking for and continue to keep my vehicle running great for many years to come.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Railroder: space

I buy this oil and would refer it anyone.

I started using aimsoil in my car a year or so after I bought it. I drive a lot, 400,000 + miles on my car at this time and still going! Know I use aimsoil in my tractor also.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by GreatOil: space

Offers Great Protections

Only oil I have used in over 45 years of changing oil, That after 18000 miles still has plenty of protection left in the oil. Got to use a good quality filter as well, but this oil is awesome

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Fast1LE: space

This is all I use because it's the best

Pay a little more and get a whole lot. I use Amsoil in my transmission, rear diff and engine. World of difference. I track my car as well and believe me I'm hard on my driveline. Gears, transmission and engine perform at optimum levels with Amsoil and you are protected. If it's used in racecars it's for a reason.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Kyle: space

Buying again

Great product, buying again.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Canonball: space

It's my new standard go-to oil

This oil has made a noticeable difference in my hemi. It's made the engine quieter and given me better overall gas mileage. You can't go wrong with the right oil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Erik: space

Great Products!

I run amsoil in every motorized vehicle I own...very happy with all products

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dan: space

Best Premium oil on market

I started using Amsoil several years ago in my 2-stroke YZ125 and was very impressed. Back then I was rather unfamiliar with Amsoil so I started doing some research on Amsoil and other competitor brands, because I only wanted to run the best lubricants in my equipment. What my research uncovered for me is what I now believe to be so great about Amsoil. Amsoil provides plenty of literature from third-party testing that truly separates their products from the rest of the field. Other brands will only tell you what they want you to hear, but what is great about these testings is that we as customers can see for ourselves side-by-side test results, and the results speak for themselves. In these tests Amsoil's products are put through the ultimate rigors and unbelievably harsh conditions and STILL protect against breakdown and wear. The one thing about Amsoil is you won't see expensive ads on TV about what the company's oil "can or will do" for your engine like the "Big brands",however, with Amsoil you can read for yourself from unbiased third-party test results that PROVE Amsoil's greatness over competitor brands. As you can tell I am absolutely sold on Amsoil now days and run it in all of my vehicles even my lawnmower and snowblower. With harsh MN winters I need the best oil to protect with cold start ups. I would encourage everyone individual who is new to Amsoil, or even a long time user, to take a look at some of the testing that has been done on their products. Read the results! If you're still not sold on Amsoil I'm not sure what else to tell you.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Andy-Boy: space

Only oil in my goat

Long oil life, keeps me going longer without having to do oil changes, engine sounds " heathy " less valve noice.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Doug: space

Late Model Cars in Tropical Heat

Love all the Amsoil products. They've kept my 10-20 yr old engines clean and functional in severe heat.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by None: space

Nothing but Amsoil

I've been using Amsoil in my vehicles for over 10 years now and in my opinion it is the best and less expensive in the long run. Less oil changes, less maintenance and better gas mileage. Over 280,000 miles on my 2004 truck and does not use a drop of oil between changes. Would like to see more in and out oil change businesses carry Amsoil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Desertrunner: space

Great stuff

This stuff is well worth it. Noticed the first oil change that my truck runs smoother and quieter(Toyota tick). Waiting to see the oil analysis when it's time.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Scott: space

AMSOIL

Been using AMSOIL products now for approx 15 years. I use it in all my vehicles. I use change my oil every 10,000 miles with Amsoil filter. Never had an issue with Amsoil. Highly recommended,

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Perk: space

100% sold on the value of this product

When you buy something you expect it to do the job it was made for. AMSOIL does that for me. I became an Amsoil fan around 2001 when my Chevy pickup was first sold to a farmer here in Pittsburg. I was living in Alabama at the time and I had put AMSOIL in both my vehicles and was very pleased with the performance improvements i.e. mileage, performance, etc.
We moved to Texas and my wife said I needed a pickup. Every Texan man needs a pickup, so we bought a 2001Chevy Silverado with 99,000 miles on it. It ran like a new truck. I immediately put AMSOIL in it and now with 132,000 miles on it it still runs like a new truck. I haven't had to do any maintenance on it other than maintaining fluids, tires, wiper blades and the like. And i expect it to continue performing like that as long as I have the vehicle. I will never use any product other than AMSOIL lubricants in my vehicles. I also use them in my Toro Zero turn riding mower.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Full out: space

Very tough oil

I have been running amsoil For over a year now. Naturally aspirated v6 in a 2011 Ford Explorer and TwinTurbo V6 ford F150.
We know how turbo charged engines can generate heat and breakdown oils much quicker
I really like the extended drain intervals and even with almost 13,000 miles on my F150 the oil that came out was still very thick. probably could've gone several thousand miles more.
Usually with that kind of mileage and that kind of abuse oil comes out the consistency of water.

I'm not easy on my vehicles either And tow from time to time.

I just purchased oil, transmission oil, and filter for my Honda TRX 450 Atv.

You have a customer for life!!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and
submitted their review through a specific process that tracks purchase history.Reviewed by Bam Bam: space

I will buy this again

This company is #1 for oil and have a lot more products the oils I use work well I have taken motors apart in past and they are clean and no damage good products

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bman: space

Anything

I run everything amsoil even snowblower I own a boat a Jeep Wrangler Chevy Silverado rmz450 dirt bike a hayabusa and other small engine equipment all motors run perfect nothing better enough said!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Shane: space

Won't use anything but...

Ever since being introduced to Amsoil, it's all I use. I've put it toe-to-toe with friends using other brands of oil, and they've eventually seen the light and moved over to using Amsoil as well. Never disappoints.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process
that tracks purchase history.Reviewed by Ant: space

5w-30

The only reason I'm not giving it 5 stars is because I have a 2002 Nissan pathfinder with 240,000 miles leaks a lil oil but with Amsoil 5w-30 signature series and when I use it it leaks even more...think about your high mileage customer. I aslo have a Infiniti QX56 2008 with 132,000 with 5zw-30 signature Series no leaks at all and just did the transmission fluid ATF, transfer case and front a rear diff with the server gear fluid and shifts are so smooth rides like a dream 5 stars on that! But for my 02 Pathfinder had to switch back to a conventional high mileage oil with seal conditioner.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Josh: space

I buy this product

I put it in my vehicles and change it when needed

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by StorminNorman: space

Only oil to use

Amsoil is Great. I've used it for 20 years. It's in everything I own. Why would you use any other oil?

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has
purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ME: space

Repeat User

I buy this product once a year along with the oil filter. I have a car that is 16 years old and it runs great. Have always used this oil and filters.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rob: space

I have used this oil for 17 years

I use this oil in all my vehicles. It works day in and day out

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Little George: space

Its works

When you have some get in the truck & ask why it runs so well it opens the door

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ryan: space

I would buy this again!

Works great! Have used it in every machine I own for the last 13 years. I have Never once have had an engine issue on any vehicle I own since switching to Amsoil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and
submitted their review through a specific process that tracks purchase history.Reviewed by Jbush0202: space

I will buy always

Works better don't burn as fast in my truck that eat gas and oil as snacks

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Zen: space

Tried, Tested, and True

I do my oil changes annually and find that my vehicle runs smooth all year long. I've used other synthetics and have found from my experience that my car responds best to amsoil especially as I approach 20000km mark at the end of the year.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Faisal: space

I would but this product again.

Awesome product. Use it on both my car's.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by John: space

Peace of mind

The peace of mind knowing the best oil I can get is in the motor is worth it.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their
review through a specific process that tracks purchase history.Reviewed by Dejohn98: space

Signature Series EcoBoost

I feel a lot safer taking it to redline knowing that I've got good protection in those turbochargers I'll never use anything else

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by STP: space

Great Products!

I first tried this in my personal daily driver and liked it so much I'm now running this oil in three cars. Also running the racing oil, transmission fluid and gear oil in my race car!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Medic Mike: space

Great Oil

I have used AmsOil oil since 2006 i trucks, performance cars and SUV's. I love the extended drain intervals with AmsOil oil filters. When I replaced an oil pan gasket the shop was surprised how clean the oil pan was with 100,000+ miles on a 2003 Escape. Be advised when I switched to AmsOil in the 2003 Escape it had 80,000 miles on it and I used the AmsOil flush as well before first fill with AmsOil. The combination of Also oil and gear lubricants kept the 2003 Escape getting the sticker MPG new or better. I have so used this with a 2007 350Z and a 2006 Dodge 1500 5.7 Hemi with bypass filter set up.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jayme: space

Best Oil Period !!

I've been using Amsoil for over 15 years and Hands down its the best
I use Amsoils in everything that requires oil
It's works !!!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dennis the driver: space

I will continue to put this great oil in my cars

Amsoil has saved an engine when lost oil pressure and had to continue driving 200 miles. had to replace bearings but crank shaft was not damaged. I have increased gas milage.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by John: space

Long time user

Superior products used in all my vehicles

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A
Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by LH: space

Excellent

All products that I've used from AMSOIL are excellent! I would not use anything else!

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by JR: space

Used oil & filters in my 2002 Tundra since new. Have 175000+

Excellent product. Miles 175000+ change oil & filter once a YEAR

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by SuperSuzy: space

Best motor oil you can buy.

I've been a faithful customer and user of Amsoil products for almost 10 years now.

I can say with out any doubt that it has been the single best product I have ever used in my automobile.

My 2002 Suzuki XL-7 has been running on Signature Series 5W30 for 9 years straight and my motor feels like is hasn't lost a shred of power.

As an automobile owner who takes absolute meticulous care of his machine, there is simply no substitute for Amsoil.

Item Reviewed: SAE 5W-30 Signature Series 100% Synthetic Motor Oil (ASL)
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