Sixteen to one (16:1) is a ratio used by some really old 2 stroke motors. It uses quite a lot of oil compared to more modern ratios.
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?