Auto & Tools · STA-BIL Storage

STA-BIL Storage Fuel Stabilizer

Keep stored gas from gumming up carbs and injectors — treated fuel stays start-ready through the whole off-season.

Keeps fuel fresh for up to 24 months when added to fresh gas.
One ounce treats 2.5 gallons; the bottle meters the dose for you.
Formulated for ethanol-blend pump gas in mowers, boats, generators and cars.

$12.48

On Amazon when we checked (June 16, 2026) — live price may differ.

By Patrick Smith · Updated July 11, 2026 · How we review · We may earn a commission from Amazon links.

Price when checked: $12.48; on Amazon, June 16, 2026
Best for: Best for homeowners and boaters storing gas-powered equipment through an off-season.
Biggest complaint: A recurring caveat is that results are hard to prove — you only notice stabilizer when you skip it — and it…
Sources cited: 1; independent source

Reasons to buy

Long-time users report seasonal equipment firing up after months of storage and credit it with ending spring carb cleanouts; the self-measuring bottle gets frequent mentions.

Reasons to skip

A recurring caveat is that results are hard to prove — you only notice stabilizer when you skip it — and it can't revive fuel that has already gone stale.

Ethanol pump gas starts degrading within weeks of leaving the station, and the repair it causes — gummed carburetors on mowers, generators and outboards — routinely costs more than a decade's worth of stabilizer. STA-BIL Storage is the category's default answer for a reason: one ounce treats 2.5 gallons, the bottle's built-in measuring chamber meters the dose, and treated fuel stays start-ready for up to two years. An often-missed detail: opened bottles don't last forever either — Gold Eagle recommends using STA-BIL within two years of opening, so date the label when you crack the seal. Add it to fresh gas at fill-up and run the engine briefly to pull treated fuel through the whole system.

What buyers say

Our summary of recurring themes in customer reviews on the STA-BIL Storage Fuel Stabilizer Amazon listing (read July 2026) — not quotes or endorsements.

Most praised

Long-time users report seasonal equipment firing up after months of storage and credit it with ending spring carb cleanouts; the self-measuring bottle gets frequent mentions.

Most common complaint

A recurring caveat is that results are hard to prove — you only notice stabilizer when you skip it — and it can't revive fuel that has already gone stale.

Worked best for

Best for homeowners and boaters storing gas-powered equipment through an off-season.

Frequently asked questions

How much STA-BIL do I add?

One ounce per 2.5 gallons of fresh gasoline — the bottle's measuring chamber makes dosing easy. Double-dosing won't hurt, but under-dosing shortens the protection window.

Does it work with ethanol (E10) gas?

Yes. It's formulated for today's ethanol blends and helps prevent the gum and varnish that ethanol fuel leaves behind as it ages.

How long is an opened bottle good for?

Gold Eagle recommends using STA-BIL within two years of opening the bottle — write the date on the label when you first open it.