What is a common type of fuel used in a gasoline engine?

Gasoline is the primary fuel used in gasoline engines, which distinguishes these engines from diesel engines that operate on diesel fuel or other types of fuels. Gasoline is specifically designed for spark-ignited engines (gasoline engines) and provides the necessary energy for combustion to power these engines effectively. The chemical properties of gasoline, including its volatility and octane rating, make it suitable for optimal engine performance, ensuring proper combustion timing and efficiency.

While other choices such as ethanol, compressed natural gas, and diesel can be used in specific respective applications or modified engines, they do not represent the most common fuel for typical gasoline engines. Ethanol can be blended with gasoline in certain formulations, but pure gasoline remains the standard. Compressed natural gas is used primarily in dedicated or dual-fuel engines designed for that purpose.