what is mogas
Rating Newest Oldest. Best Answer: The term mogas means motor gas, that is, the gas people normally put in cars. Provided it is alcohol free, it can be legally used on any number of airplane engines.Generally an STC (supplemental type certificate) is required for such operation to be legal. Update: Yes.ating Newest Oldest. Best Answer: The term mogas means motor gas, that is, the gas people normally put in cars. Provided it is alcohol free, it can be legally used on any number of airplane engines.