Gasoline-powered marine fuel care
1 US fl oz per 10 US gallons
Use the exact Marine formula directions
The 10 oz marine-treatment package offers a different purchase quantity from the 8 oz listing. At the documented rate it provides up to 100 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
-
-
Plan the Fuel Quantity
-
Measure the Marine Dose
-
Add Before Refueling
-
Maintain the Fuel System
-
Review Storage Plans
Compare the Formula, Package and Maintenance Task
Fuel Treatment & Engine Care Selection Guides
What Customers Say
Comprehensive vapor corrosion defense above and below the fuel line
This 10oz STA-BIL 360 Marine additive (MPN 22241) provides excellent protection for my outboard's fuel system. The unique vapor technology coats internal metal parts above the fuel line where moisture usually builds up, preventing rust completely.
Perfect size for treating routine fuel tanks
The 10oz bottle features a handy measuring chamber that makes dosing simple and mess-free at the pump. It keeps ethanol-blend fuels stable and prevents phase separation throughout the entire boating season.
Fast delivery from Mariner's Warehouse
Ordered this directly from Mariner's Warehouse and it arrived safely packaged in just a couple of days. Works wonders for keeping my fuel lines clean and preventing gum or carbon buildup in the injectors.
Smooth idling and crisp throttle response
After adding STA-BIL 360 Marine to my gas tank, my 4-stroke marine engine runs noticeably smoother, especially at idle speed. It strips out trapped water and keeps the entire fuel system running like new.
Must-have additive for humid marine environments
Living near humid coastal waters means ethanol gas degrades quickly. Treating every tank with this 10oz STA-BIL additive prevents corrosion and keeps fuel fresh even during multi-week layups.
Reliable fuel system protection for winter storage
Poured this into my fuel tank before winterizing the boat. Fired up on the very first crank in the spring with zero stuttering or clogged jets. Extremely dependable formula.
Top-tier fuel stabilizer for all marine craft
A single 10oz bottle treats up to 50 gallons of fuel, making it a great value. It cleans fuel system components while offering ultimate rust and varnish prevention.
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 10 oz marine-treatment package offers a different purchase quantity from the 8 oz listing. At the documented rate it provides up to 100 US gallons of total treatment capacity. This is calculated total capacity across treatment events, not a single-tank dose.
Need Help?
Need Help Choosing the Right Marine Cleaning Product?
Trusted by 50,000+ boat owners across the USA
-
Expert Marine Support
Our team has years of experience in marine parts.
-
Fast Response
We respond quickly to get you the help you need.
-
Find Compatible Parts
We make sure you get the right part the first time.
-
Huge Selection
Access to 50,000+ marine parts & accessories.
- Choosing a selection results in a full page refresh.