Customer Ratings & Reviews

Works great!

I really see a difference!

Works longer than other products from other suppliers ..

I run this in all my cars every oil change and I’ve noticed in one that hadn’t had a cleaning in a while got a little bit better gas mileage

Had a car with misfire code. Wasn't ignition or mechanical. Fuel was old and varnished. Removed old fuel added fresh fuel and the Amsoil P.I. gasoline additive. After 20 minutes of idling reset the check engine light and have had no more misfires.Thanks David for recommendation.

This stuff just works! It delivers what ot promises. Believe it!

Put it into my 2020 Ford F-150 and noticed a slight improvement in both mileage and performance. I would recomend.

Definitely an improvement in acceleration and performance. Probably a small increase in mpg as well.

This turns 87 octane into 93 octane which means higher compression and better fuel mileage. If you can find non-ethanol gasoline, add one of these to your tank and fuel up with the non ethanol. AMAZING RESULTS! You’ll notice you can go quite a long way on that tank. You’ll also notice a little pep in your engine. This is super great for turbo engines!

I put this in my ole chevy and she seems to be running better and definitely idles smoother i would recommend to put in all older vehicles for sure.

was told needed new injectors after changing coils , still miss when first started until warmed up occasionally at red light. put 1 bottle of treatment and tank of premium with Amsoil octane booster ,been running great for 4 mo.

I have put this through a number of vehicles and noticed a difference in all of them

Very simple to add it at time of gas fill up and it seems to improve gas mileage and engine performance.

Great product

I’ve used P.I. on numerous occasions, always with good results.

Recently replaced plugs and wiring on 2009 Lexus. Used the additive 2 months later. Acceleration is superb

Improves horse power .improves gas milage Engine runs better.5 stars

This is a wonderful product. It does what it says it can do and gives us better performance and somewhat improved mileage.

All my gas engines get a dose of this once a month!

I’ve been using this for over a year now. I use to only run 91 or greater octane but after switching to this I run 87 and my fuel mileage is just as good as it was before. It’s worth it.