Properties of Lubricants

Lubricants perform various functions. Some of these are:
Reduces the loss of energy in the form of heat.
Increases the efficiency of the machine.
Prevents interlocking or inter joint welding at the surface asperities.
Increases the smooth motion of moving parts.
Reduces surface deformation, wear, and tear.
Reduces the expansion of metal by local frictional heat.
Protects material from corrosion.