The Castrol Aircol SR compressor oil range of premium lubricants are designed for use in rotary screw compressors and are based on polyalphaolefin (PAO) fluids.;Features and Benefits;Increased oil service life.;Very low deposit forming tendency, extends service life of filters and separators.;Outstanding oxidation stability and antiwear performance providing long lubricant and equipment life.;Ester-free formulation eliminates the formation of corrosive acids leading to longer equipment life.;High viscosity index gives improved sealing at high discharge temperatures whilst still permitting operation at low ambient temperatures.;Excellent water separation characteristics allow condensation to readily separate from the oil, minimising the risk of emulsions which could block the oil separator element.