Customer Ratings & Reviews

More horsepower & better mileage after using Amsoil gas treatment.

Using this for several years on a 19 year old Honda Element with 152k, Definitely notice a bump in performance & gas mileage.

I’ve been using PI in my tanks for a long time I’ve pulled injectors out after 150k and using amsoil PI they look and work like brand new

I have been using this for years in all my vehicles. I trust Amsoil to supply me with the best products to protect my vehicles. I have never had an issue with any part of my vehicles that are Amsoil protected.

I have no idea if this did any good in my cars or not. Honestly without tearing down the engine before and after I dont know how you could tell one way or the other. That said, Everything I have used by amsoil has worked very well. Most of it I could actually do the research on and could see the results by those who tested it so I could see the numbers for myself. So Im going to put my trust in amsoil on this and continue to use it with the belief that it does work well. I do know that its the PEA that works in fuel additives and this and redline have the highest concentration of PEA.

This works amazing at cleaning injection systems and intake valves. Carbon is not your friend

Outstanding product to clean fuel injectors!!! It got the job done!!!!

I haven’t even gone through half the tank after filling it up with Amsoil P.I. and I can already notice the difference in the performance of my vehicle. I have a 99 Ford Ranger 2.5l with 275k miles and it is running smoother than ever. There has been a significant improvement in throttle response as well as a significant reduction in pre-ignition knock that occurs when I step on the gas a bit. I will definitely recommend this P.I. to my friends instead of any other brand.

Put it in my daughters car. Didn’t even know I did it She said what did you do to my car. It runs great.

Good product, does the job!

I put this in my 2012 Tahoe because of my fuel mileage ( 14 -15 mpg), Ayer putting it in the tank my mpg improved 3 mpg (17-18 )

I have been using this product for years. I actually checked before and after using with a bore camera and there was a significant difference with carbon buildup. Combustion chamber Is a lot cleaner after using P.I

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.

Great products, Fast shipping, Great savings with club ...

Absolutely the best complete fuel system cleaner money can buy. Throttle response, engine performance and measurable computer analytics will substantiate the the results one bottle will produce.

I like my vehicles to be in best performance. I use Performance every 5000 miles when I change oil. Runs great !!

It's always good to keep your engine at it's best performance. I believe this product does just that!

Engine runs smoother with better performance/mileage.

Phenomenal product compared to others. Saves you money when it comes to gas mileage . Tested 3 bottles with 3 full refills on my v8 truck and felt reduction on my refill on the 4th time since I still have half of the tank left . Will definety buy some more to save on gas refills and adding more power to your engine...

I use this at every oil change. Can tell after it has ran awhile in the Engine. Smother and better acceleration.