Twenty five to one (25:1) is one of the easiest 2 stroke ratios to calculate, you simply multiply the litre amount by 4 and add a zero.
To make it easier you can use the following old school reference chart.
Fuel (L) | Oil (mL) |
---|---|
1 | 40 |
2 | 80 |
3 | 120 |
4 | 160 |
5 | 200 |
7.5 | 300 |
10 | 400 |
15 | 600 |
20 | 800 |
25 | 1000 |
Fuel (gal) | Oil (fl oz) |
---|---|
1 | 5 |
1.5 | 8 |
2 | 10 |
2.5 | 13 |
3 | 15 |
4 | 20 |
5 | 26 |
7.5 | 38 |
10 | 51 |
15 | 77 |
If you’re looking for something to help with other ratios and remind you how old your fuel is, please take a look at our app for iPhone and Apple Watch on the front page?