BlueSky Alto Syn D 46 is a synthetic lubricant providing supreme performance in industrial compressor applications. The Alto line of lubricants from BlueSky Lubricants are high performance air compressor lubricating oils primarily intended for the lubrication of severe duty reciprocating, rotary screw and vane air compressors. the "Syn D" series are supreme performance Diester based synthetic lubricants for severe duty applications that require higher temperature control and longer service life. 46 represents the thickness of the oil which is an International Standards Organization Viscosity Grade (ISO VG) 46.
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