I did a search and do not see much discussion on Seafoam. I have been using it for years but dont know if I am wasting my money or not. As mentioned on this website, I dont believe in adding it to oil, but I usually pour it in the gas tank and use it as a injector cleaner and eliminate any moisture in the tank before winter. I also pour it down the throttle body before a spark plug change and stall out the motor and let it sit. Then start it up and do the smoke screen. This is supposed to remove carbon, but who knows if it works. Anyone know of any tests? Thanks