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!

Seems to work. I have No Issues To Report

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

This made an immediate difference in my high mileage older vehicle

The product is economical and I cannot see inside my engine, BUT it helps clean the engine from the inside and doesn't interfere with performance, too. This is a stabilizer similar to what all the gasoline companies add to their product, but more concentrated, too, so it does help. I'd recommend you use it once every month or two - I have added it more than once to assure the carbon is cleaned. Moreover, there are leak stopping products for transmissions, engines and coolant - these are economical and the products work most of the time eliminating leaks and swelling the seals, etc. GO FOR IT!!!!

Wow! My 2018 RX 350L was running kind of sluggish and was getting worse. I watched several videos on fuel cleaners and Rislone was always in the top three. It was more expensive than the others by far. But considering replacing the fuel injectors would cost $1000 and probably more for my car I decided to pay the $13. And wow, I could tell the difference in acceleration in the first mile! After 15 miles I had no sluggish acceleration at all. I have only driven 20 miles so far. So I expect the acceleration will get even better. I recommend it and will buy it again. UPDATE 1/22/2024: After driving 175 miles my car runs like new! My car has 53,000 miles on it. This stuff is great.

I drive a 2010 car with about 120k on it. This, along with regular general maintenance, helps keep the older engine clean and running well. I found thisnseems tonwork better for my car than other similar products. I add it to a full tank of gas ever 1k miles or so.

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.