For a boat that burns real fuel over a season, the 32 oz bottle makes sense. At 1 oz per 10 gallons it treats 320 gallons, so you can dose every fill-up from spring to haul-out without running short.
Why bother at every fill-up? Ethanol fuel pulls in moisture, and that leads to rust and corrosion in a marine fuel system. STA-BIL 360 Marine puts a protective coating on the metal parts of the fuel system and combustion chamber, even when the engine is off. At the end of the season, the same treatment keeps marine fuel fresh for up to 12 months in storage.
Works in ethanol-blended and non-ethanol marine fuel.
STA-BIL says it strips out carbon, gum and varnish and improves power and fuel economy.
For boats, jet skis and other watersport engines.
No alcohol. Made in the USA.
Quick dose guide: a 20-gallon fill takes 2 oz. A 50-gallon tank takes 5 oz.
Storing a motorcycle, not a boat? Use regular STA-BIL Fuel Stabilizer. It keeps gas fresh for up to 24 months while the bike sits.
Common Questions
How many gallons does 32 oz of STA-BIL 360 Marine treat? 320 gallons, at 1 oz per 10 gallons. That suits a bigger tank, or treating a boat and a couple of jet skis over a season.
Is STA-BIL 360 Marine good for jet skis? Yes. STA-BIL makes it for boats, jet skis and other watersport engines. Use it at every fill-up or before storage.
Does STA-BIL 360 Marine contain alcohol? No. STA-BIL says the product does not contain alcohol. It’s made in the USA and designed for boats, jet skis and other watersport engines, used at every fill-up or before storage.
WARNING: This product can expose you to chemicals including benzene which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.