Motor fuels are substances used to power internal combustion engines in vehicles, such as cars and trucks. The most common types of motor fuels include gasoline, diesel, and biofuels. These fuels provide the energy needed for engines to operate, converting chemical energy into mechanical energy. Motor fuels are derived from various sources, including crude oil and renewable materials. Gasoline is typically used in gasoline engines, while diesel is used in diesel engines, which are more efficient for heavy-duty vehicles. Biofuels, made from organic materials, offer a more sustainable alternative to traditional fossil fuels.