STA-BIL 360 Marine Fuel System Treatment 8 oz — 12-Pack, PEA Cleaner & Corrosion Protection

STA-BIL 360 Marine Fuel System Treatment is an all-in-one 8 oz marine fuel additive that cleans, protects, and stabilizes your boat’s entire fuel system while preventing rust and corrosion.

Designed specifically for marine engines and watercraft, this PEA-based formula targets build-up and contaminants across injectors, lines, pumps, and tanks. Each 8 oz bottle delivers easy pour-and-treat dosing for routine in-season maintenance; this listing contains a convenient 12-pack so you can service multiple tanks or keep spares aboard. The product reduces gum, varnish and free water while adding corrosion resistance—helping preserve performance and reliability when your boat is in use.

How does STA-BIL 360 clean the fuel system?

The formula uses PEA detergents to dissolve and dislodge deposits from fuel injectors, carburetors, lines, and pumps so the engine can run more efficiently. It’s a preventive and corrective cleaner suitable for regular in-season use.

• Breaks down gum and varnish for smoother fuel flow
• Clears injector and carburetor deposits to restore spray patterns
• Flushes internal lines and pump surfaces without disassembly

Will it protect my fuel system from rust and corrosion?

Yes—STA-BIL 360 includes corrosion inhibitors formulated for marine environments to coat metal parts and reduce electrochemical wear. The treatment helps protect internal hardware while the engine is operating, which complements seasonal storage products.

• Deposits a protective film on metal surfaces to resist rust
• Helps slow corrosion in fuel tanks, lines, and pumps
• Suitable for aluminum, steel, and other common marine alloys

How do I use it for best results?

Application is straightforward: pour directly into the fuel tank before filling. Use one ounce of product per ten gallons of fuel, then run the engine for five minutes so the treatment circulates through the entire system.

• Dosage: 1 oz per 10 gallons of fuel
• Pour before filling to ensure mixture with fresh fuel
• Run engine ~5 minutes to distribute treatment system-wide

Can STA-BIL 360 be used alongside storage treatments?

STA-BIL 360 is intended for in-season cleaning and corrosion protection; it also stabilizes fuel during short idle periods. For extended storage or long-term stabilization needs, pair it with STA-BIL Storage fuel stabilizer to protect tanks and carburetors during winter lay-up.

• In-season: clean and protect while operating
• Idle stabilization: helps prevent phase separation and microbial growth
• Combine with STA-BIL Storage for off-season preservation

Who is this for: STA-BIL 360 Marine Fuel System Treatment is ideal for boat owners, captains, marina technicians, and anyone who wants to maintain reliable performance and extend the life of marine fuel systems. The 12-pack is convenient for commercial operators, fleets, or recreational users who prefer to keep multiple bottles on hand for seasonal service and quick maintenance between outings. It works with most gasoline-powered marine engines and fuel systems when used according to directions.