Ethanol Shield Marine Fuel Stabilizer & Preservative 2-Pack (2×24 oz) — Cleans Injectors, Removes Water, Protects Fuel System

Ethanol Shield MARINE Fuel Stabilizer & Preservative is a marine-specific fuel treatment sold in a 2-pack of 24 oz bottles that cleans injectors, helps remove water, and preserves up to 480 gallons of gasoline when used as directed.

Designed from a decade-plus legacy in fuel care, this marine formula adapts Ethanol Shield's proven chemistry to the unique demands of boats and watercraft. Each 24 oz bottle is concentrated to treat 240 gallons of fuel, and the two-bottle pack lets you treat large tanks or keep a spare aboard. The clear formula provides the same corrosion protection, detergent action, and water-handling performance engineered for marine environments.

How does this product protect boat fuel over time?

The stabilizer slows fuel degradation and reduces the risk of varnish, gum and phase separation in ethanol-blended fuels. Its antioxidant blend and corrosion inhibitors extend fuel life and protect metal fuel system components from oxidative damage.

• Preserves and stabilizes gasoline to delay aging and maintain combustibility.
• 2X antioxidant package compared to leading competitors for longer shelf life.
• 3X anticorrosive formulation meeting high ASTM and NACE benchmarks.

Can it actually improve engine performance and keep injectors clean?

The formula contains a Top Tier P.E.A.-based detergent designed to dissolve deposits that accumulate on carburetors, intake valves and injectors. Regular use helps maintain consistent fuel flow and combustion behavior without disassembling the fuel system.

• P.E.A. detergent to reduce carbon, varnish and ring-sticking.
• Maintains injector and carburetor cleanliness for smoother idling and throttle response.
• Upper-cylinder lubrication to reduce wear on critical components.

How does Ethanol Shield handle water and ethanol-related issues?

Marine environments often introduce water into fuel, and ethanol can separate from gasoline under the right conditions. This product includes a phase separation inhibitor and water-handling components to help manage entrained water and reduce the risk of ethanol lock or layer separation.

• Phase separation inhibitor minimizes ethanol and water separation risk.
• Components that help emulsify small amounts of water for safer combustion or easier removal.
• Octane stabilizing ingredients to support consistent performance in blended fuels.

What volume does one purchase cover and how should I use it?

This listing includes two 24 oz bottles; each bottle treats up to 240 gallons of fuel, so the pack can treat 480 gallons in total when dosed as instructed. Use the recommended dose at each fill or during storage to maintain fuel condition season to season.

• Two 24 oz bottles per pack; each bottle treats 240 gallons.
• Suitable for 2- and 4-cycle marine engines and all gasoline blends with or without ethanol.
• Recommended for year-round use and prior to long-term storage.

Who is this for: Ethanol Shield MARINE is aimed at boat owners, marine mechanics, charter operators and anyone who stores or runs gasoline in a marine environment and wants to limit fuel-related downtime. It's formulated for use in 2- and 4-cycle outboards, inboards and personal watercraft, offering concentrated treatment for larger tanks and regular maintenance routines. Use it if you want a concentrated, marine-focused fuel preservative and detergent backed by a long-running product lineage rather than a one-off additive.