Hydraulic oil; It is a kind of fluid to transfer power and move other parts. Hydraulic oils are generally divided into two categories: synthetic hydraulic oil and petroleum oil. This oil uses two factors of pressure and flow to transfer power. Hydraulic oils are not only used in the movement and rotation of the car steering wheel and have various and wide applications in different industries. But in the discussion of heavy vehicles, these oils are used in cranes, pumps, jacks and other things that require a lot of power to move them.