Customer Ratings & Reviews

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.

I use this ed very 4 months and definitely before a smog check up. When I get my cars tested they are way better than average and usually the technician' s are scratching their heads when I leave. It definitely cleans your fuel system you have to give it a try. I also get better gas mileage.

My 03 Tundra with 190k mi ran noticeably smoother within 50 miles of adding this.

I use this product in both of my vehicles once a month, great product

I purchase PI, every oil change. I feel that my 2010 Tahoe dose benefit from this fluid as it's high in mileage and the environment here is harsh for any vehicles. I really don't see any fuel mileage increase, but it's the engine is running smoother in the cold mornings. It's a nice treat for the "Tank".

I used this in one of my older high mileage cars and it seemed to really do what it was intended. I will use this again and probably even in the newer ones.

Been using for years. Keeps moisture out and clean injectors

Great product

Seem work good additive pi performance gasoline additive with 93 fuel noticed much more effective clean more deep work as great

I use this product every time that I change the oil on my vehicles. I drive about 1000 miles per week so I change my oil frequently. It does what it says that it does. i wish it were already added to the gas at the pumps. My vehicles run as smooth as silk.