Premix

From MopedWiki

Premix is a mixture of gasoline and two-stroke oil used in two-stroke engines. Common ratios for mixing gas with oil include 50:1, 40:1 and 32:1 (i.e., 50, 40, or 32 parts gasoline per 1 part oil).

32:1 is a richer (more oil) mixture than 50:1. Salt water is a good analogy for premix. 32 parts of water mixed with 1 part salt will yield a saltier mixture than 50 parts of water mixed with 1 part salt. Likewise, 32 parts gasoline mixed with 1 part oil will yield an oilier (richer) mixture than 50 parts of gas mixed with 1 part oil.

Use this handy calculator to figure out how much oil you need to add to your gas.