* Gasoline: The most common fuel for cars, it's a refined product from crude oil.
* Diesel: Another refined oil product, but heavier than gasoline.
* Ethanol: A biofuel made from plant materials like corn.
* Electricity: Used in electric cars, batteries store electrical energy which powers the motor.
* Hydrogen: A fuel cell car uses hydrogen to create electricity to power the motor.
* Biodiesel: A fuel made from plant oils or animal fats.
The specific type of fuel a car runs on depends on its engine design.
