May 28, 2026

STA-BIL 360 Marine Ethanol Treatment & Fuel Stabilizer (8 oz.)

$5.99

The STA-BIL 360 Marine (22239) is a premium, 5-in-1 fuel additive designed to combat the harsh effects of ethanol-blended gasoline and moisture in marine climates. This 8 oz. bottle is 4x more concentrated than regular STA-BIL, featuring Vapor Corrosion Inhibitors (VCI) that protect the entire fuel system both above and below the fuel line. It removes water, cleans the fuel system, and keeps gasoline fresh for up to 12 months, making it ideal for boats, jet skis, and seasonal small engines.

SKU: jsdf2575 Category:

Full Product Description

STA-BIL 360 Marine is a specialized “every fill-up” treatment that goes beyond standard stabilization. In a marine environment, ethanol in gasoline can attract moisture, leading to “phase separation” and severe corrosion. This formula uses industry-leading water removal technology to prevent these issues, ensuring your engine starts reliably even after weeks of sitting at the dock.

The standout feature is the Revolutionary Vapor Technology. Unlike standard stabilizers that only protect the fuel they touch, STA-BIL 360 Marine releases a protective vapor that coats the entire inside of the fuel tank and combustion chamber. This prevents rust on the metal surfaces that aren’t submerged in fuel. It also contains powerful PEA (polyetheramine) cleaning agents to strip away carbon buildup, gum, and varnish, restoring lost engine power and fuel economy.

Key Features & Benefits

  • 360° Vapor Protection: Protects the metal parts of the fuel system above and below the fuel line where others can’t reach.

  • Ultimate Ethanol Defense: Prevents damage and corrosion caused by E10, E15, and E85 ethanol-blended fuels.

  • 12-Month Stabilization: Keeps gasoline fresh and prevents oxidation during long-term storage or winterization.

  • Superior Water Removal: Actively removes moisture to prevent phase separation and fuel system icing.

  • Restores Power & Economy: Cleans fuel injectors, carburetors, and intake valves for smoother idling and better throttle response.

  • Concentrated Formula: A small 8 oz. bottle treats up to 80 gallons of fuel, offering excellent value per gallon.

Technical Specifications

Feature Details
Brand STA-BIL (Gold Eagle)
Model Number 22239
Unit Size 8 fl. oz. (236 mL)
Standard Dosage 1 oz. treats 10 gallons
Concentration 4x regular STA-BIL strength
Engine Compatibility All 2-Cycle and 4-Cycle Gasoline Engines
Shelf Life 2 years after opening; 8–10 years unopened

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