Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 (Pack of 2)

I purchased a 20 oz can of this at AutoZone ($18.99 + tax). I used the can with Sunoco Super Unleaded gas in my 2019 F-150 with the V-8 engine. I then travelled from VA to GA (8 hour drive) and I definitely noticed a difference. Pick up to merge onto the highway and passing other vehicles was a lot better and I logged 20.2 miles per gallon, which is at least an improvement of 2 MPG. My truck also idled so great that you wouldn’t even think it was running. Highly recommend this product!

Need a cleaner to clean from fuel tank to exhaust stroke? Boom, here you go. This is a great and strong product to really clean carbon deposits and the fuel system entirely. And protects for future. Easy to use and comes with a little funnel if you don’t have one. Good price and doesn't smell.

Great product!!! Several dollars cheaper than the auto parts store!!! The top fuel system cleaner!!! Highly recommend!!!

My family and I have been using Royal Purple Max Clean Synthetic Fuel System Cleaner & Stabilizer for about two years now, and it works great. My brother, who is very mechanically inclined, recommended it to me — and he hasn’t steered me wrong yet! The product itself does exactly what it claims, and we’ve been very happy with the results. My only complaint isn’t about the product, but about Amazon’s shipping. The first bottle I received was missing the funnel that is supposed to come attached, which meant I had to send it back and wait for a replacement. For that inconvenience, I’m giving four stars instead of five. Other than that, this is an excellent product, and I would absolutely recommend it.

I did not look at any of the inside items like the top of the pistons or the valve stems or anything like that but as far as performance, my vehicle which is a 17 suburban 1500 I got better gas mileage, and the engine certainly ran cleaner than it was. Hope some find this review helpful. I also use royal purple oil in several of my vehicles. I certainly like the brand. The product comes with an attachable fill tube, which makes getting it in the fuel tank a lot easier. Note: the deeper your fuel system inlet is the better off you’ll be so you don’t spill.

What a difference, even improved mileage.

This is very good stuff. I was doing a lot of driving and realized my gas mileage had decreased significantly. It was taking 2 tanks from Texas to AZ. My car was sluggish getting on the freeway. I put a can in my tank and filled up. After the first tank driving back to az I put another can and filled up. Drove the second half of the trip. The third fill up which was to begin my trip back to Texas i was accelerating quickly , finding myself doing 100mph, throttle response was excellent. The return trip to Texas i used 1 and a half tanks. 2017 toyota corolla se, 90,000 miles before I ran 2 cans, one after the other. I recommend using a few cans in back to back tanks (one can per tank for most vehicles) and you will see a difference. I follow the directions on the can now and use it every 10,000 miles. My gas mileage is like the day I bought the car new with 32 miles on it.

This product works well for me. Put in 3 of our autos. Miles per gallon picked up some and engine seems to run smoothly.