Customer Ratings & Reviews

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.

Another great product keeping my car running smooth through all kinds of driving.

With my older Yukon this sure helps the old gal

Just started using in my 2015 F-150 Lariat SuperCrew's 3.5L Ecoboost.

Seems to do the job

I will buy it again…

One of the only things I can STILL Afford that’s left on line here At AMSOIL. So I would Say if you like this Stuff BUY IT NOW!!! I’am gonna POP For one more 12 PAK Next Pay Day B4 They raise the price AGAIN??!! Sorry Guy’s, It’s just getting outta Control here and harder to Afford. But I do like this Stuff and Recommend it highly. I don’t know if it’s doing anything but I use it all the Time usually every Tank or every other Tank of Fuel.

I have never used this product, in the past, nor currently as of yet. However, I do believe, that any product that is manufactured by Amsoil, based on my past experience with them, will prove to be of extremely high quality!

Only use Amsoil products.