Crude oil is a natural component found underground. It has other components like hydrocarbon and organic compounds, crude oil is extracted in a raw unrefined state, and basically, it is used to describe raw oils from the ground. There are four main types of crude oil from very light oil to light, medium oil, and heavy oils each of the types has its distinct quality and components. Crude oil is one of the most important oil in the world, crude oil buyers and sellers reserve it for future purposes because of its value and importance of petroleum. What do you know about crude oil?