Understanding the 20:1 ratio
- 20 parts fuel: 1 part oil
- For every 20 litres of fuel, you add 1 litre of 2-stroke oil
- For smaller amounts, the ratio can be scaled: 1 liter of fuel needs 50 mL of oil
- Simple calculation: 1 liter multiplied by 50 ml, or 1 gallon multiplied by 6 fluid ounces
Use the Two-Stroke Engine Oil Mixing Calculator to accurately determine the amount of oil needed for different fuel volumes.
20:1 Stroke Fuel Mix Chart
Metric Fuel Mix (Litres)
| Fuel (L) | Oil (mL) |
| 1 | 50 |
| 2 | 100 |
| 5 | 250 |
| 10 | 500 |
| 20 | 1000 |
US Fuel Mix (Gallons)
| Fuel (gal) | Oil (fl oz) |
| 1 | 6 |
| 2 | 13 |
| 5 | 32 |
| 10 | 64 |
| 15 | 96 |
Fuel Mixing Tips
- Always measure the volume of oil accurately.
- Mix the fuel in a clean, compatible container.
- Label the container with the ratio and date.
Shake well before use. The 2 Stroke Oil Mixing Calculator can help you quickly determine the correct amount of any fuel.
Machines that Use a 20:1 Mixing Ratio
- Sawmills and trimmers
- Motorcycles and scooters
- Small outboard motors
Why the Right Fuel-to-Oil Ratio Matters
- Too little oil = engine damage
- Too much oil = excessive smoke and fouling
- Ensures smooth performance and engine longevity
Conclusion
Maintaining the correct fuel-to-oil ratio (20:1, 32:1,) ensures efficient operation of two-stroke engines, reduces wear, and prevents smoke and carbon buildup. Please use a two-stroke oil mixing calculator or consult this table each time you refuel to ensure the correct mixing ratio for optimal engine performance.