Customer Ratings & Reviews

I really like the out come of using this.

Every time I go to Mexico I buy 5 to 6 bottles I used 3 going to Mexico and 3 coming back. The performance of the truck when I go through 2 bottle I can tell the difference by alot because the truck start using less gas and I can fill more power.

Noticed gains the first time I used it. Easy to use, one bottle every 3-4k miles and piece of mind knocking my entire fuel system is maintained.

I add a bottle of this at every oil change (every 7500 miles). It makes my engine run smoother and it "feels" like it gets a bit more power. My CEL light was coming on and the code was for "knock sensors". I reset it with my code reader and it came back on within a day so. I reset it again and it would come on again. I happened to be changing my oil and added a bottle of PI to my gas tank around this same time. I reset it again and it stayed off. I was a bit confused, then I realized that the bottle of PI made my engine run so much smoother, that my knock sensors were not picking up any engine knock!! Now keep in mind this wasn't a permanent repair, I DID still end up replacing my knock sensors, but it was quite a few months later.

Phenomenal product! Cleans carbon out extremely fast and safe! Neighbors 20 year old arc would barely run. After 30 min after a dosed tank it started to run properly. 6 months later it is still running great!!

Use every 4,000 miles. I have had no problems since I started using PI.

If you want your engines to run smoothly then you should add this every 4000 miles, it works.

When used every 6 months it's like a tune up in a bottle. Great product.

Used it in my 1996 Ford Explorer with 185k miles. Used 2 bottles back to back tanks for initial clean up and now I'm getting 30-40 miles more per tank. Also smoothed out at idle. I was very impressed.

150,000 no fuel related or engine problem Chev Tahoe

Used this on a 1992 4rumner to help with the injector cleaner up. After one tank of fuel the check engine light went out and hasn't come back on since. Also a smoother idle and better fuel mileage. I know there is no such thing as magic in a bottle. But I am pretty impressed with this product.

I use the product whenever my vehicle seems unresponsive. It helps

Every time I use this product my fuel mileage skyrockets. I tend to get an extra 20-40miles out of a full tank of gas. I daily drive a turbo car that produces a lot of carbon build up and I know this product helps keep the combustion area clean along with proper oil from amsoil. I would buy this product again!

My wife has a 2011 Ford Explorer and runs amazing as I use Amsoil from the transmission to the motor oil. I had an intermittent problem which I thought was a bad coil. It was only an issue when I would jump on it under hard acceleration, it would surge and buck really bad. I replaced the front three coils as that with my Bluetooth scanner told me and the problem was still there. I than determined it had to be an injector issue. I've tried numerous other products to hopefully dislodge whatever was clogged in the injector with no luck. Than I tried Amsoil PI injector cleaner and man what a difference. It runs amazing and every time I have to accelerate hard to pass someone or merge onto the highway no surging or hesitation. I was an Amsoil believer before now i use everything they have to offer and tell everyone I know about their amazing products.

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 have noticed an improved performance difference when using Amsoil P.I. Improver when used as directed through the years in the 2005 Ford Ranger. Highly recommended to anyone using 4 cycle gasoline engines.

I added to the fuel and make my engine run smothered and more efficient.

I generally don't believe in most of the injector cleaners on the market but every vehicle that I put Amsoil P.i. in shows noticeable performance and fuel economy gains and not for only one tank full but for several months following the application.

I used this in a 2012 Mustang V6 convertible that had an occasional miss. After using the motor smoothed out and the miss has gone away. I converted all my vehicles to Amsoil, motor oil, trans, diff, transfer case, rear ends and couldn't be happier. Quality products that due what their designed to do.

I plan to keep my Genesis for a long time and therefore I did diligent research and I couldn't find any other oil that met my standards of what a quality oil should be like and frankly, I didn't find any other that filled the bill quite as Amsoil.