In Australia, gas is called petrol and it is sold by the liter in both unleaded and lead forms. The price of petrol in major cities can fluctuate on a daily basis and gas stations can be found just about everywhere in the city, and most are self-service (you cannot pay at the pump). In the outback and outside of the major cities petrol stations can be more sparse (none available for over 60 miles) and also have fluctuating hours. There are long stretches of roads in Australia that will not have petrol stations for miles, so it is important to fuel up before taking a trip on a long road, also these service stations may be closed late at night.