1. Understand the Ratio:
The ratio of 20:1 indicates that for every 20 parts of petrol, you need to add 1 part of 2-stroke oil.
2. Calculate the Oil Volume:
Since we have 1 liter of petrol, which is equivalent to 1000 milliliters (ml), we need to calculate the volume of 2-stroke oil required.
3. Formula:
Volume of Oil (ml) = (1000 ml / Ratio) * 1
4. Calculation:
Volume of Oil = (1000 ml / 20) * 1
Volume of Oil = 50 ml
Therefore, you need to mix 50 milliliters of 2-stroke oil with 1 liter of petrol to achieve a 20:1 ratio. Make sure to use the appropriate oil recommended by the manufacturer for your 2-stroke engine.