Customer Ratings & Reviews

I have been using other brand name fuel additives for several years in my 2003 Explorer and 1999 Lexus. I figured they were doing the job but never noticed any change in fuel economy, acceleration, or smoothness in engine performance. During and after one tank using AMSOIL P.i. I noticed ALL three!!! I am surprised and very happy with this product. I will use it every 4K miles in both vehicles.

I add a bottle every oil change (5000 miles). Switched from Sea Foam. Not only is Amsoil cheaper, my truck runs noticable better.

engine sounds and runs good

I use a Bottle of this at every oil change.

Seems to help performance in my vehicles, would recommend.

I have gotten better Gas mileage since using this product! Will buy again.

Car runs better and got 5mpg more !

A long time ago an Oil engineer to told me to use Amzoil 2 stroke oil, in my big Johnson outboard with low E gas. "Amzoil doesn't absorb water, so your cylinder walls won't gaul". My outboard keeps running. So, to me, Amzoil is the best. And anything they make is the best.

Have used every product imaginable over the years with little to no improvement in throttle response or gas mileage. I treated a full tank (16 gallons) in my 23 CT4 Blackwing twin turbo V6. She typically gets 19.2 city / 27.2 hwy (best ever on a 350-mile trip). Filled up again drove 520 miles there, 130 miles around town while there and 530 back at an average of 29.3 mpg an increase of 7.7% and a 5% increase around town since back! I'll keep track of how long the effects last.

PI. Restarts all your fuel injectors. And you can really tell the difference in this one. I had old engines that wouldn't hardly start until I started using this additive and it is great I will Continue to use this product until I do pass away again.

Worked like it says it does!

I have a 2003 Ford Explorer Sport with 299K miles on it. I have been using various name brand fuel additives over the last 100K miles with placebo effects. After one tank with AmsOil PI I noticed a definite increase in accelerator response and a smoothness in engine performance. I am sold and will continue to use PI every 4K miles.

Use this in my jeep. Truly believe it works. Thanks!

I added the Amsoil P.I. Performance gas additive the week before an oil change. I was getting 23-24mpg per tank before adding the product. During that tank the mileage started approaching 25mpg. Did the oil change, transmission drain (Amsoil Transmission fluid), and changed coolant (sorry not Amsoil, they don't make the product for my Hyundai. The tank after the oil change my milage was up again to just under 26mpg. I am now almost four weeks out from the time I added the additive to the gas tank. I am averaging just at or a little above 226mpg every tank. Simply amazed!

Works great, cleans injectors and helps maintain better fuel mileage. I use it in all 8 of my vehicles every 5k

Just run this in your tank. Your car will be happy.

Great stuff. Well recommended

This is amazing, improved performance on all my vehicles. Improved my gas mileage.

Love the product, seems to work like it supposed to

This is my first time using this product so far everything is good. I hope it is cleaning my system out and I hope it increases my gas mileage. I will follow up and let everybody know what I have found out.