Customer Ratings & Reviews

I use it in my 2006 Mark LT when we go on trips and I believe we get about a mile more to the gallon. I have 120000 miles and have used Pi in the L T about four time back and forth to Ohio.

Not sure how well it worked as I put it in the wife's car. She didn't complain about anything so it at least didn't make anything worse. I really like AMS products and this is another quality item. Will purchase again.

I add this product when I fill up my gas tank once or twice a month. It negates the negative effects of the water in the gas, makes my vehicles run better and cleans.

Every time I use this additive my mpg always increase by 1 to1.5 ! I'm surprised at how even top tier gasoline can use extra cleaning for a better burn.

Used Amsoil PI in a number of cars and every time I use I get better gas mileage and better throttle response.

I have a 2005 Chevy 3500 with a 6.0 L it was getting 6 mpg . Cleaned air filter and put this in tank it went to 12.6 mpg and on next fill up , I got 9.6 mpg (I did pull my trailer ) that week but will try the pi fuel additive again

I used to use Sea foam, but this product is better and it is less expensive.

seems to help quite a bit when I use it

2007 Envoy with 5.3 V8. Changed spark plugs at 110,000 mi. Looked excellent! No injector issues or fuel pump problems. Get 18 mpg regularly. All lubricants in this vehicle are Amsoil.

This product is amazing. I have been using it for three years now, and the results are the exactly what is promised. I used a bottle every 3000 miles in all three of my cars.

Noticed a change in my gas mileage right away!!!

Every time I use this, my vehicles run better and mpg goes up as well. Recommend highly

Smoothed out the idle and throttle response improved. I don't recommend using this all the time, but I think it is a must with every few oil changes.

I use this every oil change, works great

l usually sad a bottle to tank gas every 5,000 miles to prevent any trouble with gas and engine

Seen immediate results when I put this in my truck. Improved the idle better than several other products that I have tried.

Put it in gas as per directions, drove it around in my 2012 work van, 140,000km. Normal average consumption is 11.8 to 12.4L/100km, and I fell in that range for the treatment tank, and the following tank. Can't say if it cleaned anything out, but I can say it didn't help mileage.

Use it in all my vehicles, snowmobiles, motorcycles, and other gasoline powered stuff.

I used on a 2008 Mercedes Benz c300 and got great results.

smoothed out my idle and the car has a bit more zip now!