Petrol is a fuel derived from petroleum. If you are American, you probably call petrol "gas." When the price of petrol goes up, lots of people complain, because petrol is gasoline. Petrol is the fuel used in many types of vehicles, including cars, motorcycles, motorboats, and aeroplanes. Gasoline or petrol is a derivative product of crude oil/petroleum. In the US and Latin countries, the term gasoline is used, but in Europe and Asian countries, it's called petrol. Description: Majorly all around the world gasoline is used as fuel for vehicles.