Customer Ratings & Reviews

Makes a dramatic increase in fuel economy

I've used the products and can only hope they work as advertised and from on-line reviews. Right now the jury's still out.

This always makes the car run more smooth and better feeling acceleration and general improvement overall

Hey! This stuff works! I'm able to monitor multiple points on engine performance as I'm driving. I can see the process of cleaning dirty injectors as I'm traveling down the road, and it does as advertised.

All fuel systems should be cleaned from time to time as preventative maintenance. No matter how good your fuel is your system can get various deposits throughout it thus negatively affecting the fuel systems performance and fuel milage. This product lived up to its claims in my vehicle and will be used as needed in all of my vehicles.

I'm very happy with this product and will ordering more soon

Simply put it in your tank, fill it up with proffered gasoline, and drive off. Cleans your system and improves mpg' garunteed. ITS ON THE BOTTLE.

My old truck has needed new injectors for a few years, but the repair costs more than the vehicle. PI clears the check engine light and literally gets it firing on all cylinders again.

Great product

Just keep using this product because it works

I can see an increase in mileage.

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.