STA-BIL Ethanol Treatment Marine Formula 8 OZ. Quick Measure, Easy Pour Bottle Ethanol problem fighter. Extra corrosion protection & fuel system cleaning. Recommended to be used at every fill-up (Not Just Seasonally) for ALL 2 & 4-cycle marine engines, in gasoline, gasoline/oil mixtures, & ethanol blends. Double the corrosion preventer & 4x the fuel system cleaner in Regular STA-BIL®. 8 oz. bottle treats 80 gal. Save $2.00 On Any 8 Oz. Sized Or Larger Bottle With Mail-In Rebate. Rebate Submission Must Be Postmarked By 12/31/10.