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Reviews for P.I Performance Improver (API)

 P.I Performance Improver (API)
Product Code: API • Brand: AMSOIL



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 P.I Performance Improver (API)

Product Reviewed: P.I Performance Improver (API)
Current Rating: 4.91 out of 5 stars
Votes & Reviews: 371 vote(s) and 230 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 Ryan the lion: space

It's a treat

I purchase PI, every oil change. I feel that my 2010 Tahoe dose benefit from this fluid as it's high in mileage and the environment here is harsh for any vehicles. I really don't see any fuel mileage increase, but it's the engine is running smoother in the cold mornings.
It's a nice treat for the "Tank".

Item Reviewed: P.I Performance Improver (API)
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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 the lion: space

It's a treat

I purchase PI, every oil change. I feel that my 2010 Tahoe dose benefit from this fluid as it's high in mileage and the environment here is harsh for any vehicles. I really don't see any fuel mileage increase, but it's the engine is running smoother in the cold mornings.
It's a nice treat for the "Tank".

Item Reviewed: P.I Performance Improver (API)
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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 Rich: space

Would buy again

I used this in one of my older high mileage cars and it seemed to really do what it was intended. I will use this again and probably even in the newer ones.

Item Reviewed: P.I Performance Improver (API)
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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 Hank: space

Awesome product

Been using for years. Keeps moisture out and clean injectors

Item Reviewed: P.I Performance Improver (API)
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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 rooroo: space

First bottle

Great product

Item Reviewed: P.I Performance Improver (API)
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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

Expensive Product

This product works very well and I like using it, however it is expensive which limits my ability to purchase more and use it more ofter.

Item Reviewed: P.I Performance Improver (API)
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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

Expensive Product

This product works very well and I like using it, however it is expensive which limits my ability to purchase more and use it more ofter.

Item Reviewed: P.I Performance Improver (API)
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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 JMC: space

I would buy again

Seem work good additive pi performance gasoline additive with 93 fuel noticed much more effective clean more deep work as great

Item Reviewed: P.I Performance Improver (API)
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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 ironrail: space

I would definitely buy this product again

I use this product every time that I change the oil on my vehicles. I drive about 1000 miles per week so I change my oil frequently. It does what it says that it does. i wish it were already added to the gas at the pumps. My vehicles run as smooth as silk.

Item Reviewed: P.I Performance Improver (API)
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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 R: space

Will keep on using it

Used this product many times at every oil change all but good results.

Item Reviewed: P.I Performance Improver (API)
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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 W: space

Worth a try!

I just completed my second try of P.I. I didn't notice any change during or after my first tank and waited for another oil change before trying it again. On the second use I did notice a change in mileage and the engine did seem to run smoother. I will continue to use as directed.

Item Reviewed: P.I Performance Improver (API)
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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 Mix: space

Works

Works as stated

Item Reviewed: P.I Performance Improver (API)
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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 Gas addative: space

PI

I use PI gas sedative in all 3 of my vehicles plus lawn mower and snow blower helps keep carbon down.

Item Reviewed: P.I Performance Improver (API)
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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 have bought, repurchased and will do again.Works great

Once a month you will tell a difference in all aspects,of car ownership

Item Reviewed: P.I Performance Improver (API)
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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 Patch: space

I count on it to get the job done!

I am amazed at the difference in my pickup every time I use this. I use PI twice a year. once when I do my oil change, and again 6 months later. I notice a smoother idle, a small increase in MPG and a boost in power. It is not huge, but enough to know I have used the PI, and that it is working.

Item Reviewed: P.I Performance Improver (API)
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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 Patch: space

I count on it to get the job done!

I am amazed at the difference in my pickup every time I use this. I use PI twice a year. once when I do my oil change, and again 6 months later. I notice a smoother idle, a small increase in MPG and a boost in power. It is not huge, but enough to know I have used the PI, and that it is working.

Item Reviewed: P.I Performance Improver (API)
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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 4Runner: space

Buy again

Best product ever thanks

Item Reviewed: P.I Performance Improver (API)
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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 AMSOILfan: space

I use this product on recommended intervals

I use the PI in the fuel system on every 4 stroke engine I have. It noticeably keeps them running smooth and at peak fuel economy. This was evidenced after pulling the fuel rail off my truck, which had 15 years of daily use at that time, to change intake manifold seals. The fuel injector nozzles were completely clean!

Item Reviewed: P.I Performance Improver (API)
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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 Vinny m: space

Good stuff

I have been using amsoil now for about 8 months in my cars and motorcycles and I love it works very very well and it is a high quality product

Item Reviewed: P.I Performance Improver (API)
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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 Hippie: space

Wish I had heard of this product sooner

I use P.i. in my daily driver every few months. It makes my engine run smooth and it feels peppier! My only complaint is it's a little pricey. I'm hooked though, Customer for life!

Item Reviewed: P.I Performance Improver (API)
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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 Bear: space

great product you should have it on hand

I have used the P.I.Performance in several cars and trucks of all ages. P.I. will help keep the fuel system clean and increase Horse Power and Mileage

I have recommended this product to friends and relatives and they have all agreed its a great product and will continue to use it..

Item Reviewed: P.I Performance Improver (API)
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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 Wildkatt1966: space

Best oil on the market

I have using Amsoil since 1979 in all my vehicles. I had a 1981 Toyota 4X4 SR5 that I used Amsoil from day one. I had to rebuild the tranny at 30K & 60K miles (no fault of Amsoil-Toyota used a Celica tranny that was very underrated for the 4X4). When I removed the parts the syncos and gears looked like new. The main problem was the input bearing was to small and chewed itself up at 30K and 60K miles.
Never bought another Toyota since they would not honor their 30K warranty.

Item Reviewed: P.I Performance Improver (API)
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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 Rj: space

Works awesome

Put this in all of my cars and they got better gas millage.i recommend this product to all of my friends

Item Reviewed: P.I Performance Improver (API)
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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 Sam: space

I buy PI by the case

Great product and gives your vehicle a clean out and a mileage boost.

Item Reviewed: P.I Performance Improver (API)
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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 Chief Worm: space

WOW!

I used this on a company car that only drove short distances around the work site (Orlando Airport). I used this product on my personal car and liked the results so I used it in this company car and WOW!!! The results were phenomenal. No more rough starts. No acceleration lag. It was like a totally new car.

Item Reviewed: P.I Performance Improver (API)
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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 Paul: space

Definitely worth every penny.

I use this product every other month and it keeps all my vehicles running great.

Item Reviewed: P.I Performance Improver (API)
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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 Just Rick: space

I would recommend this product, no questions asked!!

I use this product to keep the fuel injectors in my Honda Fit clean. It seems to improve the fuel mileage and restores the power that is lost because of the poor quality fuel on the market today.

Item Reviewed: P.I Performance Improver (API)
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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 BUCK: space

I USE THIS AT EVERY OIL CHANGE

WORKS GOOD, ALL MY TRUCKS RUN FINE. PUSHING 248k MILES ON MY '98 CHEVY. TRY QUICKSHOT FOR YOUR SMALL ENGINES, PUT IT IN THE GAS CAN WHEN YOU FILL UP, REALLY CLEANS UP LAWN MOWERS AND CHAINS SAWS, THEY RUN SO NICE.

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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 Tyson: space

I would buy this product again and again

I put Amsoil in everything I own. I found that my vehicles and equipment last longer and perform better. My vehicles gfet better MPG, and handle all kinds of wear and tear.

Item Reviewed: P.I Performance Improver (API)
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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 Sparky: space

Great Product

Excellent

Item Reviewed: P.I Performance Improver (API)
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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 Bigred: space

Structural repair

I like this product I use it fir cleaning the fuel systems and can tell a big difference.

Item Reviewed: P.I Performance Improver (API)
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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 Husbandly Car Repairer: space

Can I drink this and operate better?

Wifey left her flagship Mercedes Benz unused for a long time and the engine was really rough. I poured in 2 oz per tank until the idle was smooth. I recommend putting a little in at a time in case injectors get plugged with a whole bottle. So start slow for the first tank and then increase. Lovely stuff.

Item Reviewed: P.I Performance Improver (API)
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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 SAABGUY: space

Have Before And Will Buy Again

Great Product,Probably The Best.Wish AMSOIL Cut One A Break On Shipping!

Item Reviewed: P.I Performance Improver (API)
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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 Tbone: space

Excellent product

Have used this product for years have never had any fuel system problems.

Item Reviewed: P.I Performance Improver (API)
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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 Big red: space

Structural repair

I like this product I use it fir cleaning the fuel systems and can tell a big difference.

Item Reviewed: P.I Performance Improver (API)
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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 Curt: space

Really works!

I use this in all of my vehicles, but I really know it works when I had a motorcycle that was used very little. The carbs were gummed up and it wasn't running right. I really didn't want to tear the carbs apart, so I ran a few tankfuls of gas with PI in it through and it cleaned up the carbs. The motorcycle now runs right!

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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 Nuts and bolts: space

I will buy this again

Install this in your gas tank and your milage might just incress .

Item Reviewed: P.I Performance Improver (API)
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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 Big z: space

Used every 10 thousand miles

I've used amsoil ever since I bought my car new. And the fuel injector cleaner joined with the oil has kept the car running great and like new.

Item Reviewed: P.I Performance Improver (API)
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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 Clint: space

Best additive I have ever used.

I usually use Lucas but now I'm forever switching to the performance improver. I have used this in my motorcycle and my car. When using this with regular gas with 10% ethanol in it I usually see an increase in my dodge dart from 31 mpg to 34 mpg. When using it with regular ethanol free gas i get 39 mpg. In my motorcycle i only use ethanol free premium gas and see an increase from 50 mpg to about 58 mpg.

Item Reviewed: P.I Performance Improver (API)
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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 Hikerman124: space

The name says it all!

The name says it all, "Performance Improver Gasoline Additive"! It does exactly as the name says, it has improved the power and responsiveness of all my vehicles and toys and improves mileage as well. I got the second best mileage that I ever gotten in my Tacoma truck after adding a full bottle to a tank of gas. And that's despite driving 10-15 km/hr. faster than I normally drive with a 40-50 km/hr. head wind over a 5 hr driving period. The only time I got better mileage was with a 60 km/hr. tail wind and driving 25 km/hr. slower.

Item Reviewed: P.I Performance Improver (API)
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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 Big D.: space

I would buy this again.

I use this in my 2003 Ranger Ford & my 2003 Explore. It keeps my intake clean and gave me more horse power too.

Item Reviewed: P.I Performance Improver (API)
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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 Big D: space

I would buy this again.

I use this in my 2003 Ranger Ford & my 2003 Explore. It keeps my intake clean and gave me more horse power too.

Item Reviewed: P.I Performance Improver (API)
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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 Trevor: space

Yes I will buy this product again.

I think Amsoil make top of the line products. I use this product in my vehicles every 4 to 6 months.

Item Reviewed: P.I Performance Improver (API)
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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 Eyhab: space

I would buy this again

Fantastic

Item Reviewed: P.I Performance Improver (API)
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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 Chguck: space

Have used it to good effect in all my cars

If used as directed it does a great job

Item Reviewed: P.I Performance Improver (API)
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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 BAC: space

P.i. Gas Additive

Use this on both my vehicles every 5,000 miles and it seems to help keep injectors clean, running smoothly with smooth idling.

Item Reviewed: P.I Performance Improver (API)
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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 Rich: space

I buy all the time

motors that don't get used much put PI in smooths right out.buy it

Item Reviewed: P.I Performance Improver (API)
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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 Lineman: space

Smooth running

This added 2 plus mpg, I really don't care about that, I want smooth running and clean burning

Item Reviewed: P.I Performance Improver (API)
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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 Hector: space

I would like to buy this product again again

Good product thanks amsoil

Item Reviewed: P.I Performance Improver (API)
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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 Jonesy: space

This stuff REALLY works

I put a bottle of this in my 2005 Chevy Avalanche every 5000 miles and between that and Amsoil Signature Series oil I use I have over 200,000 miles and it is still going strong!!

Item Reviewed: P.I Performance Improver (API)
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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 Iceman139: space

Just cheap insurance for fuel system

I am not sure if the product actually does much to improve the fuel mileage of my 6 cylinder Chrysler 200 but it does seem to run smoothly . I just use it when I change my oil and filter to help keep the fuel injection system clean. I figure if I'm gonna put in clean oil.and filter, might as well clean fuel system too!

Item Reviewed: P.I Performance Improver (API)
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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 Iceman139: space

Just cheap insurance for fuel system

I am not sure if the product actually does much to improve the fuel mileage of my 6 cylinder Chrysler 200 but it does seem to run smoothly . I just use it when I change my oil and filter to help keep the fuel injection system clean. I figure if I'm gonna put in clean oil.and filter, might as well clean fuel system too!

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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 pete: space

IP PERFORMANCE

WORKS VERY WELL

Item Reviewed: P.I Performance Improver (API)
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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 San Diego: space

Amsoil P.I. Best there is

Used in a Scion tC, cleaning agents inside work very effectively. Can feel power being restored to the car over the course of the tank of gas. I use 3/4ths a bottle every 5000 miles to make sure everything is clean and pristine.

Item Reviewed: P.I Performance Improver (API)
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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 Crimefighter: space

I would definitely purchase this product again.

My Honda Accord, EX-L had a hesitation problem for some time. I tried other additives that did not work. When I tried Amsoil Gasoline Additive it worked and is still working. Next treatment is at 4000 mile after first use.

Item Reviewed: P.I Performance Improver (API)
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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 Mario: space

I will buy this product again.

Love this product and I do use the P.i. performance improver gasoline additive every 3 thousand miles. Do recommend.

Item Reviewed: P.I Performance Improver (API)
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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 Gmcfanboy: space

Excellent product

Had a slight hesitation after shifting into 2d gear for the last year. Added bottle to full tank of gas and by a 1/2 tank the hesitation was gone and has remained gone.

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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 Kipster: space

Good stuff

Am using this stuff every oil change. Will update as I go

Item Reviewed: P.I Performance Improver (API)
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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 Champion200: space

Excellent results

I use P.i. every 5000 miles because it's easier to track that frequency on my odometer. I have over 130,000 miles on my 2007 Silverado and have experienced zero fuel injector problems.

Item Reviewed: P.I Performance Improver (API)
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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 Falcon: space

Very potent

Occasionally I pull a plug from my engines and use a bore scope and check the combustion chamber.
Valves and pistons are carbon free thanks to this excellent fuel additive.

Item Reviewed: P.I Performance Improver (API)
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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 Barry: space

Been using this product for many years

Add a bottle of P.I. to the tank of our 2011 GMC Terrain V6 every 5000 miles since new. Now have about 134,000 miles and it runs better than new. I am really amazed at how smooth it runs and the gas mileage is the same now as it was when new. I use P.I in my H-D motorcycle and for the all the motorized lawn and garden equipment. My 23 year old lawn tractor still runs like a top; Amsoil in the crankcase and P.I. in the tank.

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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 Viper6: space

Best on the market

I use it in my car, truck, motorcycle, lawnmower, chainsaw, trimmer, blower.

Item Reviewed: P.I Performance Improver (API)
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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 J. Ras: space

Great additive!

I drive about 5000 miles per month. Once a month I use the PI and can hear, feel the difference.

Item Reviewed: P.I Performance Improver (API)
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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 Bruce: space

Clean up

Gas was slightly contaminated AMSoil straightened it all out.

Item Reviewed: P.I Performance Improver (API)
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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 Blake: space

I buy this product with every oil purchase

I put this product in everything from my lawnmower equipment to my motorcycle to my turbo daily driver. I can see the improvement in fuel economy and the engines just run smoother. Also my lawn equipment's fuel system doesn't seem to get gummed up as often.

Item Reviewed: P.I Performance Improver (API)
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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 Kevin: space

It's the best

I can tell a huge difference in my cars . Most other products I can not. I love Amsoil products!

Item Reviewed: P.I Performance Improver (API)
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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 Boostedwrx: space

Great product

Great product love the performance and protection I getting from additive

Item Reviewed: P.I Performance Improver (API)
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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 Desrah: space

Simply maintenance cues

I looked forward to using this product every 4500 miles in other to help maintain a clear and clogged free fuel line and filter system.

Item Reviewed: P.I Performance Improver (API)
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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 Desrah: space

Simply maintenance cues

I looked forward to using this product every 4500 miles in other to help maintain a clear and clogged free fuel line and filter system.

Item Reviewed: P.I Performance Improver (API)
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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 Gaby: space

Loved the product

I purchased this product for my 2010 Honda Accord with the 3.5L VTECH engine on it. It is my daily driver and work vehicle. I do not not exactly what's my MPG's since the vehicle does not have the feature but I can tell you that I am using one quart of gas when before I was using half tank of gas in one week period just going and coming back from work. Also it is city driving. Loved the product.

Item Reviewed: P.I Performance Improver (API)
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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 Tony: space

50/50

Satisfied with the purchase, but since I do a lot of city driving and fuel up every 2 days, not really sure if I improved my mileage.

Item Reviewed: P.I Performance Improver (API)
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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 Tony: space

50/50

Satisfied with the purchase, but since I do a lot of city driving and fuel up every 2 days, not really sure if I improved my mileage.

Item Reviewed: P.I Performance Improver (API)
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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 Jams: space

I would buy this product again.

I tried this product just this one time on a trip. I give it five stars because I was satisfied with it although I would need more time to fully test it.

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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 Jalms: space

I would buy this product again.

I tried this product just this one time on a trip. I give it five stars because I was satisfied with it although I would need more time to fully test it.

Item Reviewed: P.I Performance Improver (API)
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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 Dave: space

Extremely pleased with the noticeable results!

Used this priduct to clean fuel system on our Nissan Rogue. Instead of just 28mph, we now get 33mph.

Item Reviewed: P.I Performance Improver (API)
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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 mcf: space

This is a worthwhile part of maintenance for your engine

Whenever I'm off on a long trip I use this product and am now close to 200,000 kilometres and 10 years of use without any engine problems at all. My Toyota Tundra pickup is running like new.

Item Reviewed: P.I Performance Improver (API)
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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 mcf: space

This is a worthwhile part of maintenance for your engine

Whenever I'm off on a long trip I use this product and am now close to 200,000 kilometres and 10 years of use without any engine problems at all. My Toyota Tundra pickup is running like new.

Item Reviewed: P.I Performance Improver (API)
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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 from Kentucky: space

Instant tuneup

Adding this is as simple as it gets. My runs like it was new and the gets the gas mileage like it to. A bottle every 3 months works the best for me I'm my Ford Focus. Totally sold on this stuff.

Item Reviewed: P.I Performance Improver (API)
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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 Rollin: space

Injection power that keeps your car running like new.

I used this product on my 01 lexus es300 at the begining of this year, and saw almost instant increase in lost power and accelaration reaction time. since then I've used it twice and everytime, Especially when used after or before using quickshot, my car always responds like new and my engine feels clean and responsive. It helps that I use only shell gas as well.

Item Reviewed: P.I Performance Improver (API)
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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 Dave: space

I buy this a couple of times a year.

I use this in my Ford car once or twice a year to clean the fuel system.

Item Reviewed: P.I Performance Improver (API)
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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 Singer of Songs: space

Amazing, just like everything at Amsoil.

I use this product religiously to keep my fuel system on my 2005 Ford F-150, in the best shape I can.

Item Reviewed: P.I Performance Improver (API)
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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 Randy: space

Yes I would buy it again

I used it in the gas tank of my Volvo XC70 to help the engine run smoother, it sounded like water might be their, It works great.

Item Reviewed: P.I Performance Improver (API)
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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 Alan: space

Highest quality of products.

I recommend Amsoil to anyone that wishes to take the best care of their vehicles. All that have tried the products, are completely satisfied, & they have said no other brand of products would be used in the future. Only Amsoil!

Item Reviewed: P.I Performance Improver (API)
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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

I would buy this again

Works great

Item Reviewed: P.I Performance Improver (API)
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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 longhaul: space

insurance

I have used PI twice a year since the car was new and at 240,000 kilometers it idles smooth and has the same driving feel as new. I call that insurance.

Item Reviewed: P.I Performance Improver (API)
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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 tootall: space

Will buy product again

Use in all my gas powered equipment

Item Reviewed: P.I Performance Improver (API)
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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 mechanic: space

PI Performance

PI Performance works great added horse power and increase fuel millage.

Item Reviewed: P.I Performance Improver (API)
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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

Best products on the market

I use all Amsoil products in both of my vehicles and have for years now. I will not use anything else in any of my vehicles.

Item Reviewed: P.I Performance Improver (API)
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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 HILTY: space

VERY GOOD

IN CAR, TRUCK, MOWERS

Item Reviewed: P.I Performance Improver (API)
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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 Zman: space

Great product!

Improved my gas mileage & performance overall better running engine for sure😎👍🏼

Item Reviewed: P.I Performance Improver (API)
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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

This product keeps my motorcycles running great

The vehicles now a days cost a great deal of money to own and repair so I believe using Amsoil products is good insurance to keep my vehicles running good and avoiding repair costs.

Item Reviewed: P.I Performance Improver (API)
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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 Jake: space

Works great

I use this product every six months. My 12.5 year old injectors were perfectly clean after inspection. I'd say it works great.

Item Reviewed: P.I Performance Improver (API)
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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 none: space

yes

It works.

Item Reviewed: P.I Performance Improver (API)
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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 Silver Hair: space

Name says it all

The Performance Improver does just that. I have used it in a Kawasaki, three Hondas, and now an Indian. I can't see it working, but I can sure feel it.

Item Reviewed: P.I Performance Improver (API)
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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 the pipeliner: space

Keep a stock of this

I add to all of our vehicles every oil change to help keep the fuel system clean and at it's optimum.

Item Reviewed: P.I Performance Improver (API)
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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 CJ: space

Awesome Fuel System Tx.!

I utilize the additive about once q. 3 mo. and I can definitely tell the difference in my wife's '08 Honda Accord 3.5L V-6. The MPG increases on HWY by about 5%! Amsoil should come out with an affordable Ethanol Tx. which counteracts the decrease in MPG/Power of ethanol blend gasoline. We strictly utilize BP gasolines, yet there is still carbon build-up even with the additives they possess. Definitely worth the price to help keep the fuel system flowing smoothly!

Item Reviewed: P.I Performance Improver (API)
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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 Jake: space

Try it

Makes a dramatic increase in fuel economy

Item Reviewed: P.I Performance Improver (API)
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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 mr jim: space

PI GAS ADDTIVE

PUT IT IN TWICE YEAR IN A FULL TANK.
AND NEVER HAD A PROBLEM STARTS GOOD
IN ANY WEATHER HOT & COLD WET OR DRY

Item Reviewed: P.I Performance Improver (API)
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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 Butch: space

I'll be buying all AMSOIL products from now on.

I've used the products and can only hope they work as advertised and from on-line reviews. Right now the jury's still out.

Item Reviewed: P.I Performance Improver (API)
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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 Monk: space

Just works

This always makes the car run more smooth and better feeling acceleration and general improvement overall

Item Reviewed: P.I Performance Improver (API)
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