Coolant (or antifreeze) protects your engine from freezing while defending components against corrosion. It plays a critical role in sustaining engine heat balance by removing heat. In a heavy-duty diesel engine, only one-third of the total energy produced works to propel the vehicle forward.
Hydraulic oil is very different from other types of oils and lubricants. Hydraulic oil is a non-compressible fluid which is used to transfer power between hydraulic machinery and equipment. It is also commonly known as hydraulic fluid.