I've used it Kyle, and it works really good. I've ran it through the tank of a 1967 110 that has sat a couple of years and on initial start up, smoked a bit. After running the engine for about a half hour, the smoke cleared up to the point of non-existent. Just a cap full in your gas tank should do the trick. Some guys put it in with their oil, however if the mixer isn't quite right, the seafoam will break down the oil velocity and will end up giving you more troubles than you wanted, so be very careful if you elect to go this route. I'd try the gas tank method first to see how things go. Good Luck!