Customer Ratings & Reviews

I've got to be able to take my Terminal Wife to her appointments or to VA to visit our Son's without problems. I'm not taking chances with my cars. This product has the science and correct ingredients to keep my fuel system clean.

We have a 2014 Lincoln Navigator, and an 08 F150. I've been using this at least twice a year on both trucks. I don't track MPG, but I know that both trucks are running smoother than when we got them. In my mind, this is cheap insurance.

You can see the difference in gas mileage when you use this additive.

No fuel problems and improved gas mileage

Ran PI in my 2016 5.0 f150 on a road trip with 93 borescoped my motor and so much cleaner, then changed my oil Amsoil 5-30 full syn I’m pushing 90 k on the OD and my baby runs clean. All Amsoil products have gotten me to 300 on OD on my fords I’ve owned!!! Freakin great stuff

Legit Street Cars recommended this for any and all fuel system cleaning. I have a HIGHLY modified Audi RS3 on E85 that developed an idle misfire on cylinder 4. Within about ⅓ of a tank, the check engine light was off and has not come back since with 2 full tanks. This is probably the best for cleaning DI injectors out there. Highly satisfied with the additive.

I have seen many ads and have heard many reviews about this product. First time using this product and it has enhanced my vehicle performance.

I added to all three cars with the idea that on DI, the inlet will be clean. I never w degradation - so no idea if it works. I'll give it as a recommendation for now and 4 stars. If I find evidence for improvement, I'll rank this as 5 stars. Cars are two 992.2 3.0L and an Explorer 3.0L.

I use the P.I. every 5k miles in all of my vehicles to keep the fuel system working at peak performance. I know I get the results having pulled the fuel rail off my truck at 162k miles. All the fuel injectors were completely free of any carbon buildup and working like factory new!

The AMSOIL P.I. fuel additive works well, it quiets the engine, better performance, and makes the engine run smoother.

This stuff is great!! Where I live currently, the gas is junk but after one use of this product my truck runs better and is getting better gas mileage. I put it in my wife’s truck as well and literally after one use it has improved fuel mileage and it runs better. Will definitely be purchasing again. Looking forward to becoming a dealer and representing AMSOIL the proud way.

Trusted brand works great

I wish I'd known about this sooner! I only put about 75 miles a week on my car, stop and go to work and back. Bought my car used so I assume it already had some carbon buildup. Noticed quite a difference the first day! Will definitely use this once a year to keep it clean and responsive.

Best injector maintenance cleaner and combustion chamber cleaner on the market.

I’ve used this fuel system cleaner before going on a long vacation drive and I noticed that my car and truck ran better after using it

I use this every 4/5 tank of gas. Not only does it clean the injectors, It make the TT ecoboost 3.5 run amazing!

Smoothed out idle and rough starts

Excellent fuel system product that actually does what it's supposed to do. I personally use a bottle at every oil change.,keeps the injectors spraying instead of squirting.

Had a check engine light on my truck said it was O2 sensor. Had it replaced still came on. Put this in and check engine light has been off ever since

Always does the job! Thanks