An advanced, high performance gasoline additive designed to protect fuel systems from problems caused by ethanol gasoline (up to E85) and non-ethanol gasoline. High performance detergent chemistry cleans up carbon deposits and prevents all types of fuel system deposits. Storage Seal keeps carburetors, injectors, intake valves, and combustion chambers cleaner. Helps prevent phase separation. Effective in all types of gasoline applications and engines. Formula stabilizes fuel one year or longer. 4 oz. additive treats 40 gallons of fuel.