Modern oil lubricants usually contain one or more additives designed to > Cause the oil to flow at lower temperatures Have less variation of viscosity with temperature Resist foaming when agitated by high-speed machinery Resist oxidation at high temperatures Prevent corrosion of metal surfaces > Reduce friction and wear when full lubricating films cannot be maintained 8 Introduction to Engineering8 Introduction to Engineering Modern oil lubricants usually contain one or more additives designed to  Cause the oil to flow at lower temperatures  Have less variation of viscosity with temperature  Resist foaming when agitated by high-speed machinery  Resist oxidation at high temperatures  Prevent corrosion of metal surfaces  Reduce friction and wear when full lubricating films cannot be maintained