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)|
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?