Synthetic Aviation Grease Compostition: Lithium Complex Thickened synthetic base oil. Developed to meet Boeing Specification BMS 3-33 (now 3-33A) which includes most of the requirements of MIL-G-23827C and adds a difficult dynamic bearing rust test, using 3 percent sodium chloride. It is used in roller bearings, actuator screws and other airframe equipment operating in the temperature range from -100 °F (-73 °C) to +250 °F (+121 °C) where excellent corrosion protection is important. Qualified under MIL-PRF-23827C and BMS 3-33A specifications.