Customer Ratings & Reviews

Really didn't see much improvement

I bought into the hype about this product and signed up. 2 bottles later and there's no true results I can see or tell on my Chevy work truck. Overall I'm disappointed in this product.

Bought a 12 pack, started adding 1 every fill up, checked mileage before and after, maybe 1/2 mile per gallon better. For the cost per bottle, doesn’t justify 1/2 mile per gallon. Sorry….

It worked as advertised just like every other product I have used from AMSOIL.

I tried in two different cars. The Subaru went down two miles per gallon. The equinox made no difference. I check mileage in all my cars every fill up and maintenance is written in the log book.

After using this product on multiple occasions and in several vehicles, I did not notice any significant improvement in performance or fuel economy

Though the description states it works without using the funnel you need the funnel, I spilled a good bit before realizing I needed the funnel, Amsoil, please remove the "funnel not need description".

It’s decent but would not say it’s any better or worse than say Techon

Although this product does do the job, you’ll pay handsomely for it & there are similar products on the market that are just as good for less.

Have not been able to detect any improvement. Possibly changes are so minimal that it is hard to notice a change. I am not saying that the product is defective but might need some test equipment to pick up a low-lying improvement.

I really can't tell yet if it improve the gas mileage or performance yet because I have not driven for yet, but if it is the same stuff I us in 2010 then it will be great.

I have run this gas treatment 2 times in my 2017 2500HD. I honestly have noticed no difference in motor out put, Horse Power or better MPG. I will try this in my Ford Ranger to see if there is any noticeable difference in the near future. If I could get my money back for the 2 bottles I purchased I would. This product might work for others but I was not impressed.

Need more miles to evaluate product properly.

Did like instrucion said but made car run rogh at idle.

I used this product on my 2015 Mazda 3 and 2017 Honda Civic Touring 1.5t and did not notice anything different, no improvement in idling, performance or mpg. I've always been using top tier gas on all my cars so that might be the reason why I'm not noticing any improvements.

Another product that is quite hard to measure as a consumer. I used one bottle in a 36 gallon tank so who knows what happened. It's possible I might need two bottles for such a large tank to have any measurable results.

Have not noticed any real difference in the mileage factor increase or otherwise when using the PI Performance. I do still purchase to help keep the system clean and at peak performance. My Ridgeline has 140,000 miles and not been tuned up yet for it's first time, because there is no build up on the plugs and she still runs like she always has and the engine is clean due the PI Performance and the Signature Series Synthetic Amsoil used. I would recommend it's use increased mileage or not just as a preventive measure to keep the system clean.

It didn't work as good as I thought it would but I'm going to give it another shot and see how it goes other people had better experiences with it than I did

I am not sure if the product actually does much to improve the fuel mileage of my 6 cylinder Chrysler 200 but it does seem to run smoothly . I just use it when I change my oil and filter to help keep the fuel injection system clean. I figure if I'm gonna put in clean oil.and filter, might as well clean fuel system too!