Customer Ratings & Reviews

I use Amsoil PI in all three of my vehicles. My gas mileage and improved my performance improved now I don't have to mash on the gas to get the power out of my engine. I have tried many other products and I have found this to work the best.

I use it in everything including small engines and it reallyworks

Generally, I will use a system cleaner directly before an oil change to keep my fuel injection system happy and help eliminate any minor contamination. The truck I use this routine on has over 250,000 miles on it and doesn't miss a beat. After the treatment, I find the EFI meters fuel consistently delivering smooth acceleration all the way through the RPM range. I don't know about increased fuel mileage, but it makes the drivability of the truck seamless.

I always add a bottle to the tank when I am forced to get gas that isn't Top Tier.

PI is a great product brought my 96 mustang back to life

Works great

I use Amsoil products from oils and filters, transmission, grease, and coolant. This just seemed right to put in my vehicles.

Prior to additive I was getting 18 mpg city/hwy mixed... pretty regular trips and driving habits. After additive I started getting over 19, 19.7mpg.. using an ODB II Port gadget with app, Automatic Pro, and it does a great job giving you driving stats and trips taken, as long as you enter fuel fill ups and maintenance records, it does the rest. So, I'm impressed by the ability of this additive to clean my injectors and combustion chamber to give me better mileage and a bit more pep. I'm driving a 2012 Acura RL 3.7L V6.

I like it because I don't have to put it in every time I fill up my truck

I've tried techron before and didn't really know if it helped no but this one I felt it almost right away it does feel like it cleans.

I have an 11 year old Dodge Ram I am very particular about. This stuff was great in giving back a little of the oompf I was looking for.

2 times Plus Switching to AMSOIL Motor Oil and I can feel the difference when stepping on the peddle.

It definitely improves my Gas Mileage

Noticed absolutely no difference. Will stick to what i normally use every 3000 miles.

I use amsoil because it's the best oil money can buy.

I have carefully monitored my mileage before and after using this product. I always get 4 - 5% better mileage on a tank of fuel treated with P.I. Performance Improver. I treat my vehicles with it twice a year. Once in the spring, and once in the fall. I have never had a fuel injector problem.

I use the AmsOil PI on a regular basis in my 2014 RAM, Hemi. Excellent product, keeps the engine running great / clean, 22 mpg on the highway.

Put it like this efficient and reliable. Better than oem performance.

Use both the PI and the amsoil synthetic oil and filters (signature series) Taurus SHO 2010. Car runs smoother and better gas milage ...tested both before and after .... Will never buy another brand again!

Car runs smoother with a fuel increase of 2 mpg.