Rislone 4700 Hy-per Fuel Complete Fuel System Cleaner, 16.9 oz.

This fuel system cleaner really makes a difference — smoother acceleration, better performance, and great value in a pack of four. Easy to use and keeps the engine running at its best!

I been using this for years it works great. You feel the difference almost instantly I highly recommend it.

I purchased this product a couple of times now and I'm really pleased with its quality that it brings to my gas mileage and the smoother my engine sounds. I've used other treatments that were lower in cost which are considered good however this product is a bit pricey to be purchasing too often regardless of its performance which is great. I would prefer this product overall when it comes to performance, functionality, as well as speed just can't really see purchasing too much. I do still have leaks but products can only do so much depending the problem

The first time I used it on my 2025 Landcruiser with 2000 miles on it my fuel consumption dropped from 21.9 to 19 mpg. I was shocked but rode the tank out. Two tanks later I put a second bottle and I got 23 mpg. Same driving. Even newer cars need cleaning and I can feel a nice acceleration improvement and it runs very quietly.

It does work for a temporary fix. Price wise is very inexpensive against other brand products that are 30 to 40 dollars or even 50 dollars that guarantee passing emission results. If you use this product for every 5 -10 full fuel tank period or more, I can say you can extend your catalytic converter life, a system with a smooth riding & less noise under the hood. If it is every 2 fuel fill up, you will need a new catalytic converter. I have used it on my vehicles the last year and mileage increase has been noted.

The mechanic gave my dad a $600 quote to fix his van. I told him to wait a couple week and I put a bottle of this in about half a tank of fuel and in about 4 days his problem of hard start and bad fuel economy was fixed. No, mechanic was not screwing my dad. Mechanic was going to perform the Industry standard repair they were bought to do; change spark plugs and clean injectors. This product removed all the carbon from everything and solved the problem in a cheaper way than the mechanic was willing to do

I use this every oil change. Keeps vehicles running smooth.

Review is for: Rislone Hy-per Fuel Complete Fuel System Cleaner Gas 8 y/o vehicle felt like sluggish acceleration (especially uphill under light load) but otherwise running fine and recently serviced. Figured the price was right and would give product a shot in a full tank of gas. Reset trip meter to accurately check MPG. Acceleration seemed to improve slightly, but MPGs went down measurably. Things back to previous state after a few hundred miles. TLDR; Would not buy this again unless I was driving a much older and less maintained vehicle.

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Haven't seen any difference

Heard about it and tried it, was good no complaints.