Sta-Bil Marine Ethanol Fuel Treatment And Stabilizer Sta-Bil Marine is the essential guardian against the impact of water on engines operating in high-moisture environments like boats and jet skis. Tailored to combat water contamination from ethanol-blended fuels or environmental exposure, it actively expels water, prevents gum, varnish, rust formation, and shields against corrosion within the fuel system and combustion chamber, ensuring peak performance and longevity. 8 OZ bottle treats 80 gallons 32 OZ bottle treats 320 gallons Features: Prevents gum, varnish, rust and corrosion in the fuel system and combustion chamber Keeps stored gas fresh indefinitely For use in all 2-cycle and 4-cycle engines Recommended by 20 top engine manufacturers