What is a 50 to 1 gas oil mix?

Mixture ratio of gasoline and "2-stroke outboard oil". 1 part of oil for every 50 parts of gas. It's much easier to just read the label on the oil container. There are markings for the exact amount to use.

FYI: 2-stroke motors do not have oil like automobiles. They get their oil from this mix. The motor can be damaged if not properly mixed.