These are heavy duty multigrade special purpose gear oils for differentials / axles of heavy commercial vehicles. These oils are blended from selective additive systems meeting API MT1, API GL-5, MIL-PRF-2105 and has potential for extended drain period From conventional 36000-40000 KMs to 72000-80000 KMs. Servo Gear Axle SS 80W-110 meets API GL5,API MT 1 , has oil drain potential of 200,000 kms .