You guys are worried about water in the fuel, moisture caused by cold and heat, and I say again what has more trouble with water than a boat. Your using 7 ounces of seafoam to treat 7 gallons of fuel. Stabil 360 marine with vapor technology treats 10 gallons of fuel with 1 ounce of Stabil. an 8 ounce container treats 80 gallons for a buck or two more than your seafoam. The vapor technology keeps the unused portion of the tank above the fuel in tip top shape thru the storage period. Storage of gasoline for 2 years guaranteed. That is all I will say about that and you can use what ever turns your crank. We all have our favorites.