If you’re storing more than one machine, buy the 32 oz. It treats 80 gallons at 1 oz per 2.5 gallons, so it covers a couple of bikes, a trike, the generator and the spare gas can, and STA-BIL Storage keeps that gas fresh for up to 24 months.
When to add it: while the gas is fresh. STA-BIL’s own advice is to add it at the pump. Treat the gas can, too, and everything you fill from that can is treated without thinking about it.
That means no draining the tank before storage and easier starts when you pull the bike back out. Stale gas leaves gum and varnish in the fuel system, and that’s what this stops.
Works in all gasoline: 87, 91 or 93 octane, ethanol or non-ethanol.
For all gasoline engines, including 2-cycle: motorcycles, cars, collector cars, boats, generators and small engines.
Made in the USA.
Fill tanks to about 95% before the bike sits, then run the engine a few minutes so treated fuel gets all the way through. Only storing one bike? The 10 oz bottle treats 25 gallons. For the rest of the off-season list, see our motorcycle storage guide.
Common Questions
How many gallons does a 32 oz bottle of STA-BIL treat? 80 gallons, at 1 oz per 2.5 gallons. That’s enough for a few bikes, or a bike plus the gas can for your other gear.
Can I add STA-BIL to my gas can instead of the tank? Yes, and STA-BIL suggests it for small engines. Treat the can when the gas is fresh, ideally right at the pump, and everything you fill from it gets treated gas.
Do I need to drain the gas before storing my bike? No. STA-BIL says treating the fuel eliminates the need to drain it before storage. It keeps gas fresh for up to 24 months and prevents gum and varnish build-up.