Originally Posted by billt460
Is there even one? If so, which have you had the best luck with? I'm talking about the, "pour in the tank and drive", fuel system and fuel injector cleaners. I've heard Gumout Multi-System Tune Up is good for the newer engines. I know one can doesn't do much. Most people run several cans through before they notice a change. There are so many of these types of engine cleaners on the market, I wondered if one is any better than the other. Also, can any of them damage your catalytic converter?
https://gumout.com/multi-system-tune-up/
So far I have tried Gumout, Redline, Techron, Amsoil, Berryman, Prestone, STP and nowadays I only stick with Redline, Techron and Berryman. I think the good thing about Redline is the Upper Cylinder Lubricant and tendency to soak, so seemes more effective in the long run. Berryman is good for shock dosage but seems very harsh to valve seal, Techron is good but once is the more expensive especially if you can not find the big bottle.
I find the Gumout and Amsoil is more on the average one, it comes with performance booster, so you will feel the engine more alive when the cleaner is inside your tank, but once you refill seems the final result is not as good as Redline. Redline at the other hand, will mute your engine performance if you put too much, but the performance much better once you refill the tank.