Twenty four to one (24:1) is a ratio used by some older 2 stroke motors, largely it seems to have been replaced with 25:1 or 50:1 these days. The ratio is not the easiest 2 stroke ratios to calculate.
To make it easier you can use the following old school reference chart.
| Fuel (L) | Oil (mL) |
|---|---|
| 1 | 42 |
| 2 | 83 |
| 3 | 125 |
| 4 | 167 |
| 5 | 208 |
| 7.5 | 313 |
| 10 | 417 |
| 15 | 625 |
| 20 | 833 |
| 25 | 1042 |
| Fuel (gal) | Oil (fl oz) |
|---|---|
| 1 | 5 |
| 1.5 | 8 |
| 2 | 11 |
| 2.5 | 13 |
| 3 | 16 |
| 4 | 21 |
| 5 | 27 |
| 7.5 | 40 |
| 10 | 53 |
| 15 | 80 |
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?