How much Sea Foam in 25 gallons of fuel [SOLVED]

For storing fuel, add 1 oz of Sea Foam Motor Treatment per gallon of fuel.

If you are adding Sea Foam to a 25 gallon fuel tank, here’s what I’d do: run the fuel down to about 4 gallons and add a full can of Sea Foam Motor Treatment. Then, run until almost empty before refueling. The high concentration of Sea Foam will work much faster and more efficiently than adding it to a high volume of fuel.

Hope that helps!