STA-BIL 360 Marine Fuel System Treatment, 12-Pack 10 oz — PEA detergent, water-control & corrosion protection

This marine-grade treatment is formulated to address the specific demands of watercraft engines by combining PEA-based detergents with corrosion inhibitors and water-control chemistry. Supplied here as a 12-pack of 10-ounce bottles, STA-BIL 360 is intended for in-season use to keep fuel systems clean, stabilize fuel while idle, and help maintain efficient combustion and reliable starts.

How does STA-BIL 360 clean and protect a boat's fuel system?

The product uses powerful PEA (polyetheramine) additives to dissolve gum, varnish and deposits from injectors, carburetors, fuel lines and pumps, while its corrosion inhibitors form a protective layer on metal surfaces. It also helps manage small amounts of water in the fuel to reduce phase separation and corrosion causes.

• PEA detergents break down stubborn carbon and varnish.
• Rust inhibitors coat internal metal to slow oxidation.
• Water-control agents reduce micro-droplet corrosion risks.
• Safe for modern fuel systems when used as directed.

How do I use this treatment on my watercraft?

Pour the recommended dosage directly into the fuel tank before filling. The general guideline is 1 ounce of STA-BIL 360 per 10 gallons of fuel; then run the engine several minutes to circulate the treatment throughout the system.

• Measure: 1 oz per 10 gallons of fuel.
• Add to tank before refueling to aid mixing.
• Run engine for at least 5 minutes to treat injectors and pumps.
• Use regularly during the season for ongoing maintenance.

Will this product improve fuel economy or engine responsiveness?

By removing deposits that impede fuel flow and obstruct spray patterns, STA-BIL 360 helps restore more efficient combustion and consistent power delivery. Improved atomization and cleaner injectors can contribute to better throttle response and may support modest gains in mileage under normal conditions.

• Clears injector and carburetor deposits for better fuel spray.
• Helps maintain consistent fuel flow to pumps and lines.
• Supports efficient combustion which can aid fuel economy.

Can I use STA-BIL 360 for winter storage protection too?

STA-BIL 360 is formulated primarily for in-season cleaning and protection while your craft is in use or idle. For long-term winter storage, pair it with STA-BIL storage-specific stabilizers designed to prevent fuel degradation during extended non-use.

• Excellent for in-season maintenance and idle stabilization.
• Use storage-specific STA-BIL products for extended layup.
• Combining products gives both cleaning and long-term stabilization.

Who is this for: Recreational boat owners, tow-boat operators and marine technicians who want to maintain clean fuel delivery, reduce rust and varnish buildup, and improve engine reliability during the boating season. This 12-pack of 10 oz bottles suits operators who service multiple vessels or prefer keeping spare treatment on hand for regular maintenance.