I use this product with every oil change and my minivan has almost two hundred miles and the injectors are still as good as new and the minivan is still saving gas.

Used as recommended for many years in both GDI & non-GDI vehicles for 200K+ miles. No issues with fuel injectors or Intake valve buildup.

Love it you really feel the difference

Your car feel thank you using this product!

Great FI cleaner. Cleans combustion chambers and keeps your vehicle running new.

I use this in my 2013 2500 HD GMC and have had no fuel related problems in 160,000 miles.

I am always a little apprehensive about performance claims on things you cannot physically see or test for. This product defies that... I decided to switch to Amsoil everything on our 2015 GMC Acadia and said what the heck I’ll try this out too. After using it once my 3-4 crank start ups went back to the factory fresh 1-1/2. Went on a family trip that usually uses 1-1/2 to 1-3/4 of a tank and this is where it got really good, went round trip on 1 tank!!! Highly recommended this, can’t say the frequency, but at least once a year. Good stuff!!!

Haven't used this product long enough to give it a honest review, but if it is as good as the other Amsoil products then its a good product.

Love this product. Within a day can feel the improvement in power. Makes my Durango R/T roar.

Very pleased with results

Good stuff for the keeping the fuel system fairly clean. I use it about twice a year, or every 4k miles on all my vehicles.

ALL AmsOil products are excellent, better than any comparable brands 👍🏻💪

Works great.

I highly recommend. Though I'm not sure how clean it makes things in the engine, I can tell you for sure that you notice something from the first bottle you put in. I use a bottle of this at the first fill up after each oil change.

I use this a couple of times a year in all my vehicles to clean my engine. I usually add it before a long trip on the road to get a good cleaning. It's hard to say but it seems to keep my engine running good.

I started using PI when I bought my 2001 GMC that has an 8.1l engine. I does help to improve the gas mileage on my truck. The 8.1 was not built for mileage but for towing. PI does improve the gas mileage. I highly recomend this product.