Gasoline-powered marine fuel care
1 US fl oz per 10 US gallons
Use the exact Marine formula directions
The 1-gallon marine-treatment package is the largest single Marine package in this batch. At the documented rate it provides up to 1,280 US gallons of total treatment capacity. Marine gasoline fuel treatment is intended for the fuel-care needs of gasoline-powered boats and other suitable watersport equipment. The manufacturer positions this formula for use at every fill-up, supporting fuel-system cleaning and corrosion protection when used as directed. It is a different product from diesel stabilizer, fogging oil and a carburetor-cleaning aerosol.
Choose the container quantity by how much fuel you plan to treat across your refueling schedule. The measured rate remains the same across the listed sizes. Calculate the dose for the fuel being added or treated rather than using package size as a single-tank instruction.
Before selecting a marine ethanol fuel treatment, check the gasoline and ethanol limits approved by the engine manufacturer. The additive’s compatibility statement does not authorize a fuel blend that your boat or engine does not permit. Review the product label and refueling procedure before application.
If the boat will be laid up, compare the storage instructions for this formula with the requirements of the engine and fuel system. Fuel treatment is one part of maintenance and does not replace inspection, water-separator servicing or other tasks required by the equipment manual. Keep the remaining additive closed and stored as its label directs.
Clear Product Details
Review the 16 oz gel format, specifications and application directions.
Surface Guidance
Check fiberglass, gelcoat and finish suitability before use.
Product Support
Ask about your surface and stain type before ordering.
Shipping & Returns
Review shipping information and return conditions before purchase.
FUEL & ENGINE CARE GUIDE
Plan the Correct Marine Gasoline Fuel Treatment Task
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Plan the Fuel Quantity
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Measure the Marine Dose
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Add Before Refueling
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Maintain the Fuel System
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Review Storage Plans
Compare the Formula, Package and Maintenance Task
Fuel Treatment & Engine Care Selection Guides
What Customers Say
Best bulk value for large marine fuel tanks
Purchasing the 1-gallon jug of STA-BIL 360 Marine (MPN 22250) is the most cost-effective way to treat my twin-engine boat's 120-gallon fuel tank. The vapor corrosion protection prevents internal rust above and below the fuel line throughout long off-season storage.
Unbeatable protection against ethanol phase separation
Ethanol-blended marine fuel usually degrades quickly in humid dock conditions. This 1-gallon additive strips out moisture and stops phase separation completely. My outboard engine fires up on the first try every time.
Fast shipping and leak-proof packaging
Ordered from Mariner's Warehouse and the 1-gallon container arrived quickly with a perfectly sealed cap and zero leaks. STA-BIL 360 Marine keeps fuel lines clean and prevents carbon buildup effortlessly.
Noticeably smoother idle and crisp throttle response
Added this treatment to my gas tanks before a long weekend trip. It cleaned up the injectors and eliminated stalling at idle. The 1-gallon bulk size treats up to 640 gallons of fuel, making it a huge money-saver.
Essential winterization treatment for boat owners
I pour this gallon stabilizer directly into the deck fill before parking the boat for four months during winter layup. Fired right up in the spring with zero smoke or clogged fuel filters.
Reliable defense for humid saltwater environments
Saltwater humidity will destroy internal fuel components without proper additive protection. STA-BIL 360 Marine's vapor technology coats raw metal inside the tank to stop rust before it starts.
Great product for multi-boat and heavy fuel users
I use this 1-gallon container to treat both my center console boat and jet skis. Easy to pour, accurate treat ratio, and preserves gasoline quality for up to two years.
Frequently Asked Questions
Is this marine product for gasoline or diesel?
This Marine formula is for suitable gasoline applications. Choose a diesel-specific additive for diesel fuel.
What is the Marine treatment rate?
The manufacturer specifies 1 US fl oz per 10 US gallons of fuel. Follow the supplied label.
When should it be added?
The manufacturer directs adding it before refueling and recommends every-fill-up use.
Does a larger package change the dose?
No. Package volume changes total capacity, not the rate per gallon.
What is the stated stabilization period?
The manufacturer states up to 12 months when the product is used as directed with fresh fuel.
Does it permit an otherwise prohibited ethanol blend?
No. Follow the engine manufacturer’s fuel and ethanol limits regardless of additive compatibility.
Is it the same as fogging oil?
No. Fogging oil protects internal engine surfaces through the approved preservation method; this is a fuel-tank additive.
How much can this package treat?
The 1-gallon marine-treatment package is the largest single Marine package in this batch. At the documented rate it provides up to 1,280 US gallons of total treatment capacity. This is calculated total capacity across treatment events, not a single-tank dose.
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