Lawn-Boy 89932 4-Ounce 2-Cycle Ashless Engine Oil

What It Is

Lawn-Boy 89932 is a pre-mixed, 4-ounce bottle of 2-cycle ashless engine oil designed specifically for Lawn-Boy 2-cycle lawn mower engines that require oil to be mixed with gasoline. This is a single-use bottle intended for one tank of fuel.

Fitment & Compatibility

Before buying, check:

• Engine type: Only for 2-cycle (not 4-cycle) Lawn-Boy mowers. Look for a separate oil fill cap or a gas cap with a mix ratio label.
• Mix ratio: This oil is formulated for a 32:1 ratio (4 oz oil per 1 gallon of gas). If your engine requires 40:1 or 50:1, do not use this.
• Model/year: Works with most Lawn-Boy 2-cycle mowers from the 1970s through early 2000s, including DuraForce, F, and V-series engines. Not compatible with newer 4-cycle models.
• OEM vs aftermarket: This is genuine Lawn-Boy OEM oil. Aftermarket 2-cycle oils (e.g., Stihl, Echo) may work but must match your engine’s mix ratio.

Key Things to Know

• Ashless formula: This oil is specifically ashless, meaning it won’t leave carbon deposits on spark plugs or exhaust ports. Using a non-ashless oil can cause fouling and power loss.
• Single-use bottle: The 4-ounce bottle is pre-measured for 1 gallon of gas. Do not use less or more unless you adjust the gas volume accordingly.
• No mixing required: Just pour the entire bottle into 1 gallon of fresh, unleaded gasoline (87 octane or higher) and shake well. No measuring or guesswork.
• Storage tip: Once mixed, use the fuel within 30 days. Stale mix can gum up the carburetor. Do not store mixed fuel longer than 3 months.

Should You Buy It

If you own a classic Lawn-Boy 2-cycle mower that calls for a 32:1 mix, this is the exact oil to use—no measuring, no guessing, and no risk of using the wrong type. It’s a bit pricey per ounce compared to bulk 2-cycle oil, but the convenience and guaranteed compatibility make it a solid choice for occasional use or for owners who want to keep their old mower running clean.