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Your cart is empty.VALVTECT MARINE GASOLINE ADDITIVES "Beyond Top Tier" Detergent Technology* Stabilizes Marine Gasoline for More Than 2 Years Provides Maximum Corrosion and Ethanol Protection Reduces Maintenance Costs While Improving Power and Performance ValvTect Marine Gasoline Additive is formulated to upgrade ethanol blended & conventional gasoline to ValvTect Marine Gasoline. It is specially formulated to prevent ethanol fuel related problems by controlling moisture to prevent phase separation and maintain octane rating. * Top Tier is a performance standard for gasoline, backed by major engine makers. ... To be considered Top Tier, the gasoline must have a higher concentration of detergent added to it. Treatment Rate: 1oz Treats 10 Gallons - 1 Bottle Treats 320 Gallons