What type of gas does a 4 stroke engine use?

A 4-stroke engine typically runs on gasoline, which is a type of fossil fuel. In some cases, it can also use alternative fuels such as ethanol or propane, depending on the engine's design and intended use. Diesel engines, which are also classified as 4-stroke, use diesel fuel instead of gasoline. The specific type of gas used depends on the engine's specifications and requirements.