Boiling temperature should be low
Should develop foam
Oil viscosity should not be same in hot and cold condition
Oil viscosity should be suit the operating conditions
Wet sump lubrication
Splash lubrication
Petrol-oil lubrication
Dry sump lubrication
Crank Shaft
Cam Shaft
Crank pully
Timing gears
Crank web
Crank shaft thrust bearing
Crank shaft main journal