Been using this stuff 7 years in my Grand Banks Eastbay and Krogen express. Many many thousands gallons diesel. My filters are spotless. Not sure why I bother changing them. Never want to go through the fuel system cleaning again after experiencing sludge buildup triggering total failure on the high seas.
This stuff is great. About one fl. Ounce per 25 gallons with small measuring cup. Can’t be any easier!