Abstract: The low temperature performance of grease is becoming more important against the fast-growing of industry and defense industry. As one of the three major components of grease, thickener plays a vital role in the low temperature performance. The metal soap thickeners, Li-soap and Ca-soap, lithium complex soap thickener, calcium sulfonate soap thickener and non-soap thickener like bentonite and polyuria, were added to PAO4 and PAO10, respectively, to prepare greases with different thickener. The results indicated that the low temperature performance of the greases had great correlations with the type of thickener, the low temperature performance of single metal soap base grease is better than that of composite metal soap base grease. Being the same viscosity of base oil, the low temperature performance of metal soap grease was the best, followed by bentonite grease, lithium complex grease, polyurea grease and calcium sulfonate grease.

Key words: thicker, lithium complex grease, low temperature performance, similar viscosity