Car has 100k and runs smooth. Making sure the fuel system is clean and operating is important.

I use this item religiously and put it in my cousins vehicles and wires .

So you want your injectors cleaned? This product is worth every penny. The injectors in my Mercruiser 7.4l were gumming up and I was told they needed replacement. I put two bottles of this stuff in and ran it in the water under load for about 15 minutes and all of a sudden, the boat is running like new. No issues after 10 hours.

I have a T-GDI vehicle and after using this product, I am noticing better acceleration and idling, albeit a very subtle change. Anything that can help clean injectors is a very good product. I will continue to use this product every 4000 miles as instructed in the directions for use.

I used this on my truck, car, bike and lawn tractor. It does what it says, all ran better and truck showed a slight mpg bump. Best part, works great with capless fuel systems!

Great stuff I use every oil change

Helps keep your engine cleaned and running right!

On the first tank I noticed a difference in the engine. It was very smooth and quiet. I will use it again

First time using this product so we will see.

I add to fill up a couple of times per year. Make the vehicle run smoothly and improve performance.

Gotta stick with a name you trust, and i trust these products to help me care for my engines

I try to use this product every other oil change and I'm amazed that every time it seems to get better MPG. I use it on a Suburban with a 5.3. When I started using the products from Amsoil it would average 14.5 MPG now it averages 15.9 MPG. Still not great but I'll take what I can get.

Been using PI now for several years. In my wife's previous Ford Expedition (2007 5.4L) she did not buy the most quality fuel all the time. Would add PI at every oil change and could actually tell a difference. I use PI in all our current vehicles as well. Not sure I see the MPG increase that it states, but it does help performance.

Bought the truck used. Was operating on f as rm fuel. Was never winter driven and stored in a quonset. 60k Km on odometer. Seemed to be burning a bit rich. Thought I noticed a bit of soot. After one application of this product I noticed a significant improvement in average fuel economy and the soot issue cleaned right up. The engine idles smoothly and power and acceleration was improved. I ran one applications through a 2013 Buick Enclave. Same results. Smoothed out the idle and marked improvement in fuel economy. I’m happy with this product. W

This is the first fuel additive I've used that actually does what it says it will do. Used it in my GMC truck that had hesitation issues and it cleared up the hesitation and skipping after the first bottle.

Best gas additive bar none!

Use this product in our 2017 Class-C motorhome, Ford E-450 super-duty V10. Runs strong!

Keeps fuel injectors clean.

Cleared up the cold hesitation my old f250 had.

Love it