The frame lube oil system is designed for a maximum allowable lube oil temperature of 190 F, with a required thermostat setting of 170 F. These temperatures are based upon the viscosity needs as outlined in the Ariel Packager Standards Section 6 Lubrication. Refer to this section for lube oil viscosity chart for some of the common lube oil grades to determine suitability for the compressor frame oil system.