The primary fuel used in a car is gasoline (petrol) in many regions, although diesel is also prevalent, especially in heavy-duty vehicles. Gasoline is a refined petroleum product composed of hydrocarbons, which undergoes combustion in internal combustion engines to produce energy. This energy powers the vehicle's movement by creating mechanical force. The development of alternative fuels, such as electricity, hydrogen, and biofuels, is gradually changing the landscape of automotive energy sources. As environmental concerns rise, there is a noticeable shift toward more sustainable and efficient fuels to reduce greenhouse gas emissions and reliance on fossil fuels.