Customer Ratings & Reviews

I have used this on and off for a while and it seems to do the job.

I use every 4k miles as recommended. Never a fuel system issue. Works great.

It cleans thru and thru deep, you can fell the increase in power and performance plus the increase in Gas millage

I use this product every 4000 miles to make sure I don’t have any injector problems. This product cleans intake valves

I use this product in ALL engines: mower, chippers, chainsaws plus all vehicles. Engines thrive.

My truck gets better gas mileage

Thought my car needed plugs. Stuck a bottle in the tank and got rid of my hesitation and restored lost power and mpg’s

I’ve used this product in all my vehicles, Prius, G35, and Frontier pick up and the engines all respond favorably. Good routine maintenance to perform to keep the injectors and the top end of the motors clean too.

PI (Performance improver, is among the best, if not the best gasoline additive for the valves and piston heads!

Awesome make a big difference

Definitely offsets what the government considers gas these days! Boost in fuel mileage and smoother running!

Great product

bonne recommandation

Works great! Cleans fuel system very well

I noticed my Mazda cx7 had more pep and smoother running after just the first treatment. As a bonus my fuel mileage also increase.

It seems to help and gives me more mpg

Works and provides results. Helped my trucks and many other vehicles I own get better performance and definitely helps clean my fuel system.

Jury is out on whether this product is effective. I add a bottle when I change the oil in our cars each year, and we generally only put about 5-6k miles on our cars each year, so it's close to the recommended 4k miles. Been using this product for about two years and all the cars run well, so that's a good sign.

I have used this product a long time and I feel it works great

I used other fuel additives in the past, but this stuff works better than anticipated.