Fuel Stabilizer, 1 Gallon

What It Is

This is a 1-gallon bottle of fuel stabilizer designed to keep gasoline fresh in small engines—lawn mowers, trimmers, chainsaws, and other power equipment—during storage or infrequent use. It prevents ethanol-related corrosion and gum buildup.

Fitment & Compatibility

• Not engine-specific – works with any gasoline engine (2-stroke or 4-stroke) that runs on standard pump gas (up to E10 ethanol blend).
• No deck size or brand restrictions – compatible with Honda, Briggs & Stratton, Kawasaki, Kohler, Toro, John Deere, and others.
• Mix ratio – treat 1 gallon of gas with 1 oz of stabilizer (128 oz bottle treats 128 gallons). Check your equipment’s fuel tank capacity to estimate how many treatments you’ll get.
• OEM vs aftermarket – this is a universal aftermarket additive; no OEM-specific compatibility concerns.
• Do not use with diesel, two-cycle oil premix that already contains stabilizer, or high-ethanol blends above E10.

Key Things to Know

• Quality – Rated 4.8/5 from 481 reviews; effective for up to 12 months of storage when mixed correctly.
• Installation difficulty – Trivial: pour directly into the gas can or tank before filling. No tools required.
• Common gotcha – Shake the bottle well before each use; the active ingredients can settle. Over-treating won’t harm, but under-treating reduces protection.
• Storage – Keep the bottle tightly sealed in a cool, dry place; shelf life is ~2 years.

Should You Buy It

Buy this if you own multiple small engines and want one affordable bottle to stabilize dozens of gallons of fuel for off-season storage or sporadic use. It’s overkill for a single mower you use weekly—a smaller 8 oz or 16 oz bottle would be cheaper and less wasteful.