STA-BIL Storage Fuel Stabilizer review: keeping generator gasoline ready for the next outage

This is a research-based review, based on manufacturer specs and published data. We do not test products. Product claims come from Gold Eagle's STA-BIL Storage product page, checked November 1, 2026; safety guidance comes from Ready.gov and local fire and building code officials.

Every gasoline generator plan has the same weak point: fuel. During a widespread outage, gas stations need electricity to pump, so the fuel you have on hand when the power fails is often all you get for days. Gasoline left sitting in cans and carburetors also degrades, which is why generators that sat all year can fail to start on the first night of a storm.

STA-BIL Storage is the best-known fix. Gold Eagle calls it America's number one fuel stabilizer and says one treatment eliminates the need to drain fuel before storage.

Who should buy it

• Anyone who owns a gasoline or dual-fuel generator and keeps fuel in cans for outages.
• Households in hurricane or winter storm areas that fill cans before a forecast storm and may not use them for months.
• Owners of other small engines, such as chainsaws and snow blowers, that may be needed after a storm.

Who should skip it

• Propane-only generator owners: propane needs no stabilizer.
• Anyone hoping to fix gasoline that is already old. Gold Eagle says to use STA-BIL only with fresh fuel.
• Households with no generator. A battery power station needs no fuel at all.

Strengths

• Simple dosing. 1 oz per 2.5 gallons, so 2 oz treats a full 5-gallon can.
• Long claimed storage. Gold Eagle says it keeps fuel fresh for up to 24 months.
• Ethanol blends covered. Gold Eagle says it works in all gasoline blends, including ethanol-blended fuel up to E-85.
• Protects the engine side too. Gold Eagle says it prevents gum and varnish build-up, removes water to prevent corrosion and helps quick starts after storage.
• No draining. The maker says one treatment eliminates the need to drain the tank before storage, which suits a generator kept ready for an emergency.

Drawbacks

• Fresh fuel only. It slows aging; it does not reverse it.
• Manufacturer claim. The 24-month figure is Gold Eagle's own, and results depend on storage conditions such as heat and how full the can is.
• Needs a run. Gold Eagle says to run the engine about 5 minutes after adding it so treated fuel reaches the whole fuel system.
• Does not solve quantity. A stabilizer keeps fuel usable. It does not change how much a generator burns in a day.

How it compares

Stabilized gasoline is one of three ways to keep a backup power supply ready. The alternatives below avoid stored gasoline entirely. Figures come from each manufacturer's page.

Using it in a long outage

How to treat and rotate generator fuel

1. 01Fill cans with fresh gasoline at the station, then add STA-BIL right away: 2 oz per 5-gallon can.
2. 02Gold Eagle says to keep the can or tank about 95% full to limit condensation.
3. 03Fill the generator from a treated can and run it about 5 minutes so stabilized fuel reaches the carburetor, as the maker advises.
4. 04Write the fill date on each can with a marker.
5. 05Rotate: pour older treated fuel into your car and refill the cans fresh, well before the 24-month claim runs out, for example at the start of each hurricane or winter season.

How much fuel to keep

Size the stockpile from your generator's own runtime figures. Honda lists 8.1 hours per 0.95 gallon at quarter load for the EU2200i. Westinghouse lists 8 hours per 6.6 gallons at half load for the WGen9500DFc. Multiply by the hours a day you plan to run and the days you want to cover. Block running, a few hours morning and evening, stretches fuel because Ready.gov says a closed fridge stays cold for about 4 hours and a full freezer about 48.

Refuel only with the engine off and cool. Ready.gov warns that fuel spilled on hot engine parts can ignite. Pour from an approved can such as the Scepter 5 gallon Ameri-Can, and keep the generator itself outdoors at least 20 feet from windows, doors and attached garages, with CO alarms inside.