Is STA-BIL Diesel worth it for winter storage?

Yes, if you store diesel for more than a month or two. It slows oxidation and keeps fuel fresh for up to 24 months, which protects injectors and pumps from sludge and corrosion.

How much do I add per gallon?

One 32 oz bottle treats up to 320 gallons, so dose by the ratio on the label rather than pouring freely. For a small tank, measure in ounces to avoid over-treating.

Can I use it in a gasoline engine?

No. This is formulated for diesel only; STA-BIL makes separate gasoline stabilizers. Using the diesel version in a gas engine is not recommended.

Does it work with biodiesel and ULSD?

Yes. STA-BIL states compatibility with all ULSD and biodiesel blends, and it also suits fiberglass fuel tanks.

Will it prevent diesel gelling in cold weather?

Not as a dedicated anti-gel. It has a -40 F freezing point and helps with storage, but for deep cold you should also use a winter anti-gel additive.

When is the best time to buy it?

Prices vary by store; the current best is $21.99 at Amazon as of November 4, 2026. Stock up before winter storage season, when demand rises.

Where is the Sta-Bil Fuel Stabilizer, Diesel cheapest?

At Amazon, for $21.99, as of our latest check.

What do buyers say about the Sta-Bil Fuel Stabilizer, Diesel?

Rated 4.5 out of 5 from 2 ratings.

Where can I buy the Sta-Bil Fuel Stabilizer, Diesel?

8 stores we checked sell it, including Marine Parts Source, eBay, Walmart, Go2marine / LFS Marine & Outdoor, Amazon.

Sta-Bil Fuel Stabilizer, Diesel

4.5

Best price now

$21.99at AmazonObserved at 4:07 PM

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Our take on the Sta-Bil Fuel Stabilizer, Diesel

STA-BIL Diesel is a 32 oz bottle of diesel fuel additive that stabilizes fuel for up to 24 months and treats up to 320 gallons. It targets the problems diesel owners hit in storage: sludge and sediment, oxidation from heat, water in the tank and corrosion. It also cleans and lubricates the fuel system and is compatible with all ULSD and biodiesel blends. At $21.99 at Amazon as of November 4, 2026, it sits at the low end of its recent range across the five stores that carry it new.