Star Tron Enzymatic Fuel Treatment for Ethanol Based Gasoline. If you're having problems with ethanol based gasoline, this product eliminates the effects of ethanol in gasoline. Stabilizes and preserves fuel for up to one year, prevents varnish and debris from building up in carbuetors, removes carbon deposits and prevents carbon formation. Improves power by preventing octane reduction due to phase separation, makes starting easier and helps engines run smoother. For 2 and 4 stroke engines. 8oz. treats 48 gallons of fuel.