Thirty to one (30:1) is a ratio used by some older 2 stroke motors. 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 | 33 |
| 2 | 67 |
| 3 | 100 |
| 4 | 133 |
| 5 | 167 |
| 7.5 | 250 |
| 10 | 333 |
| 15 | 500 |
| 20 | 667 |
| 25 | 833 |
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?