Rislone Hy-per Fuel Complete Fuel System Cleaner Gas (Pack of 4)

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

Good product and used in all our vehichles

This is a fuel system cleaning solution that is designed for the full bottle to be used in a full sized fuel tank. This comes with a funnel attachment that goes on the top of the container after you remove the cap. I noticed that using the funnel attachment makes it pretty much impossible to not empty the full contents of the container into the gas tank. Thus, I wish they had just included a non-attaching funnel with a wider top or sold a funnel separately for those who might need one. The formula itself seems fine, as effective as other fuel system additives I have tried.

Been using this product for for several years and have noticed my vehicles engines running smoother. I also only buy High Tier gasoline.My brother n law has used this product longer than I and swears it helps boost his engine’s performance.

I can tell a difference every time I use. Great results while using on four different car brands.

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.

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!!!!

Felt the changes about 100 miles in after topping off. Will continue to use as needed.