40 1 fuel mix Page 1918

40:1 means 25 mL of quality 2‑stroke oil per 1 L of unleaded petrol—simple enough to do without a calculator, but here’s a cheat sheet.

Pour the oil into the jerry first, add fuel, cap, and give it a gentle shake—like a polite milkshake, not a maraca solo.

If your engine or oil brand specifies another ratio (some want 50:1), obey that instead; too lean risks seizure, too rich makes smoke and fouls plugs.

Use fresh fuel and a proper 2‑stroke oil—your whipper snipper will thank you.