Customer Ratings & Reviews

Great additive to keep high pressure pumps running in modern fuel systems.

Added to stale ATV oil in two of my quads and made them run a lot smoother

Put this in my 2020 Honda CRV, mpg jumped from 32.4 to 34.9 in town driving. I wonder what the PI Fuel Additive will do. Engine operates quieter and lower rpm @ idle. Definitely using this in both my Hondas at fill up!

I would put this against any other fuel injector cleaner out there. Great stuff.

This is my first time using it

Good stuff.

Perfect

Superior product does what it’s design ed for use regularly in my vehicles and my cousin’s.

Highly recommend this product! My engine runs quieter. Smooth acceleration. Hopefully it will keep my injectors clean as well.

After running a tank of P.I. Performance improver, I have used this product with every fill up. I have noticed improvements with acceleration as well as a 1 MPG improvement with fuel economy. Since my vehicle is a T-GDI, any upper cylinder lubrication is very beneficial in reducing wear and tear, keeping injectors clean, and keeping carbon build up at bay. I will continue using this product with every fill up.

Great stuff I use it every oil change

It is a great product use it at every fill-up in Honda Oddesy. It has had some packaging issues they fixed the cap problem you had to use pliers to remove the cap (tread issue). They need to make the seal with a pull tab like it had in the past. I have to use my teeth to remove the seal. It probably not good to have additives in your mouth. I'm sure they can remedy the package issue. The package is why I did not give a 5-star rating.

I buy a couple cases with each oil change and keep a few in the truck so that I can add one to each gas fill up. I wish that they were easier to open though. You'll need some type of tool like a pocket knife or screwdriver to punch through the seal so that you can peel it off. I don't recommend using your teeth, it tastes terrible.

I went from 11.5 to 12.5 mpg average to 14.9 to 15.7 mpg average. Have yet to take a longer trip, i mostly drive a 50/50 mix of city and hwy 2011 ram 1500 5.7 hemi This product I highly recommend. Will be ordering more

Some products only lubricant the upper cylinder, others only protect against ethanol in the gas. A lack of lubrication in the upper cylinder and ethanol creates performance-robbing deposits. This product addresses both issues and the additive package Amsoil developed works. I can tell the difference between Amsoil and other products.

I use this in 5 or six of my vehicle all the time. I also use it in 2 of my lawn mower which run 110 OCT unleaded raceing fuel

I love it

I have used this product for a couple of years and it seems to work well.

This stuff keeps my upper cylinders lubed especially on start up and idle. Noticeable difference when I don't use it.

Great product from amsoil.