Customer Ratings & Reviews

Car runs smoother- good insurance for the fuel system

This works very good in my Optima with GDI. The best I have ever used and the price is really good for what it does.

Used it on a used 2007 Honda Accord V6. It helped bring the engine run smoother. Used with Amsoil motor oil, flush and filter.

This has boosted my fuel efficiency in may cars and keeps my away form the gas pump.

Beats any fuel additives I’ve used before!

A real fuel system cleaner I've gained 1.8 mpg in my truck

I used this in my 2013 F150 before a road trip. I usually average 15 mpg on these trips but noticed that I had returned at 17.1mpg after adding this to my tank. Its been a little over a year since the last treatment and I'm noticing a slight reduction on mileage so its time for another treatment.

Super product! It really works!

I feel this product "did" clean my injectors.

Stuff amazing, cleaned the injectors on my old Datsun with one bottle. Improved my mileage on my Elantra considerably, highly recommend it

Nice to know that my fuel system is taken care of too when I service my vehicles.

After using this I notice i am getting 2 - 3 mpg per tank. So it cleaned something and will keep using twice a year. I highly recommend using this every 5,000 or 10,000 miles.

I put Amsoil in everything I have, from my cars , truck, motorcycles, dirt bike, Boat, side by side, ATV and yard equipment. They even sell gun oil!

I have used this product in both of our daily drivers. They idle smoother and the gas mileage got a little better in both vehicles as well.

been using this product since 2004. work well and will keep using it

I use this every time we make a trip to other states. I only need one for a tank. I got about 44MPG!!! at one point during my trip. I averaged 40Mpg there and back about 850 mile trip one-way. I'm still getting great gas mileage for close to a moth after putting it in one tank. I highly recommend this product!!!

I use PI every couple of tanks of gas and haven’t had any problems.

This stuff really works. It really cleans the fuel system.

Great product. I’ve used it every 5,000 miles on all my cars over the last 3 years.

This product helped attribute to fantastic idling and MPG just like the upper cylinder lubricant. I like to put this product in when I change my oil and go on a long road trip. The deep heat cycle of the engine helps clean the carbon deposits in conjunction with P.I. Improver. These products are fantastic and I will continue to buy them.