Cures and prevents ethanol fuel problems Helps prevent phase separation Makes engines start easily, run smooth Stabilizes gasoline for up to 2 years This item is not for sale in Catalina Island Cures and prevents ethanol fuel problems. Improves fuel economy, reduces emissions and cleans entire fuel delivery system from tank to injectors and combustion chambers. Removes carbon deposits and helps prevent future deposits. Stabilizes gasoline for up to two years. 1 oz. treats 6 gallons of fuel, bottle treats up to 48 gallons of gasoline.