Rated 5.0 out of 5 by 2
Rated 5.0 out of 5.0 by Mark Preventative maintenance
This is one of those products where you can't really tell if it works because you'd have to take apart your engine. I added it to my vehicle's gas tank with about a gallon of gas left in it, then filled up as per the instructions. So far, so good. The vehicle doesn't run any differently, better or worse, but I like to use a fuel system cleaner about every 10k just as a matter of preventative maintenance. This product is only 6 oz and the bottle is small and easy to store/transport when compared to other similar products.
June 7, 2015
Rated 5.0 out of 5.0 by goodreason Trusted Product
Been using Gumout products for over 40 years, and the one product that I come back to the most is the fuel system cleaner. It prevents rust and corrosion, keeps the fuel injectors clean, helps eliminate moisture, and prevents deposits and carbon from takeing form on your valves and combustion chamber.
Gumout recommends adding the cleaner every 3,000 miles, this would be the optimum, but I think it might be somewhat of an overkill. 6,000 miles might be more in line with keeping your engine running in good condition.
April 20, 2015