Sodium (Soda) grease is produced by blending of thickener (Soda soap) and additives into petroleum base oil stock. Sodium greases have a dropping point about 175 °C and it can be operated at 121°C. Therefore, Sodium greases are used in reasonably high temperature operations, such as electric motor bearings (Manual Engineer, 1999). Additionally, Sodium greases have an excellent protection against rust and it can be mixed with other greases to produce higher quality grease. However, sodium greases have a lower water resistance than other greases types (Totten, et al. 2003).