Servohydrex oils are ash less type antiwear type hydraulic oils which possess high viscosity index,excellent lubrication characteristics. These oils are recommended for very low operating temperature conditions. Servohydrex TH 46 is recommended for Tata Hitachi excavators and Servohydrex 100 is approved by L&T for use in Poclain excavators. Servoexcavator TH 46 is approved by Hitachi.