STA-BIL 22284-6PK 360 Protection Ethanol Fuel Treatment and Stabilizer, 12 Fl. oz., (Pack of 6) Prevents corrosion above and below the fuel line  where no other additive can! Ultimate protection against Ethanol blended fuels Cleans fuel system to improve performance Stabilizes fuel up to 12 months Use at every fill up, improves power and fuel efficiency