Petroleum is a very dense fuel source. In fact, just 1 kg of it can release about 10,000 kilocalories when burned.
This means that it doesn’t need a lot of petroleum to generate enough energy to power automobiles and machines.
It is a naturally occurring, yellow-to-black liquid found in geological creations beneath the Earth’s surface.
It is commonly refined into various forms of fuels. Components of petroleum are detached using a method called fractional distillation, i.e. parting of a liquid mixture into fractions differing in boiling point by means of distillation, naturally using a fractionating column.