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Gasoline lasts about 12 months with stabilizer, but only in an approved container stored away from heat and ignition sources.
For the full breakdown, see our best Container for Long Term Gasoline Storage guide.
Gasoline goes bad faster than most people expect, so the basics of how to store gasoline long term come down to four habits: an approved can, a fuel stabilizer, a cool detached shed, and rotation. Skip any one of those and the fuel’s shelf life shrinks fast.
How Long Does Stored Gasoline Actually Last?
Unstabilized gasoline starts going stale quickly. Maine’s Department of Environmental Protection (Maine DEP) says not to store gasoline for more than 30 days unless a stabilizer has been added. With stabilizer, the practical ceiling is about 12 months; beyond that, stored fuel can form deposits that damage small engines.
Those two numbers are the ones that matter. Some sources stretch stabilized storage to two years, but the official guidance settles on 12 months as the reliable target. Label the can with its fill date and treat one year as the deadline.
| Factor | Guideline |
|---|---|
| Unstabilized gasoline | Use within 30 days |
| Gasoline with stabilizer | Replace within about 12 months |
| Approved container | UL-approved, red, labeled, usually 5 gallons or less |
| Fill
|