Lets have a look at Hydraulic Oil which serves a variety of purposes. It functions as a lubricant, sealer, and medium for the transmission of energy or power. It is a fluid that also cools the machinery and removes impurities. Furthermore, in the latter application, low flow rates are being used with high applied pressures. Right now, Hydraulic Oil is offered in a few ranges like 5 Ltr Hydraulic Oil 68 32 46, and Hydraulic Oil 68. Because of this, fluids used to convey power inside a system or piece of equipment must not compress. This is widely used in hydrodynamic applications.