Customer Ratings & Reviews

Great fuel additive if you are looking to keep your motor clean and running at its peak. This is the fuel additive you need.

Amsoil does it again with a great product and ease of use

This stuff is great! I used to use Marvel's in my oil and in every tank of gas, but my Suburban was starting to slow itself down, the knock sensors were crying all day... I switched to Amsoil and things are looking up! I use Signature series oil and add this PI every 4th tank; no more knock. Very pleased!

I never really believed the effects of these gasoline additives, but this one produced results. My truck doesn’t have that thick white exhaust smoke any more and starts way better than it did before two applications of the performance improver. You do need multiple applications to see any improvement, but my truck only took two.

I use this occasionally just because. I don’t think it does anything for Milage and Not sure about Cleaning anything since I don’t get an INCH MORE per mile or gallon of Fuel ⛽️. And I don’t tear down my Engine to look at valves and Injectors and I don’t own a Bore Scope! It’s too expensive if ya ask me but I switch back n forth between StarTron and this Stuff. Star Tron is $32 per QUART (32OZ) And Treats 1200 Gallons of Fuel! Yes, thats 1200 GALLONS (1200).... a much better deal and probably every bit as good. Even still not an inch a Gallon per mile!!! Nothing!!! Is it worth it??? I suppose it’s piece if mind and Nothing more???

Feel smooth accelerating will buy it again

My 2008 toyota tacoma would sometimes hesitate when accelerating. Not anymore with just one use!

When we add this about every 3rd tank my wife notices the fuel increase and power

EXCELLENT CLEANER

Excellent product! I can tell an instant difference in throttle response. I personally do not see an improvement in MPG, however my friends do. Driving a 2500 with oversize tires I’ve pretty much given up on improved fuel economy.

Never really notice an increase in mileage but it does help if get bad gas and with emissions. Get this for every 4000 miles

This product does EXACTLY what's printed on the label! I gained at least 60 more miles to a tank of fuel and the engine is more efficient and responsive. Great product! Awesome job Amsoil!

I feed this stuff to my new truck, my wife's 80k mile truck and my sister's 150k+ SUV. The latter two love it (don't notice much but a slight bump in MPG in my new truck). It definitely helps the higher mileage vehicles...I wouldn't think about using anything else; it's that good!

Run this through my F150 twice a year. Keeps things running great. I just trust Amsoil products and this one is a ‘must have.'