| By adding a thickener to any of the synthetic oils, one creates a grease.  A thickening agent serves to retain a film of lubricating oil in proximity to the moving parts thus preventing migration for applications where a constant bath of oil or a reservoir are not practical.  Thickening agents come in many forms.  Typical examples are: Sodium, Lithium,Teflon, Molybdenum Disulfide, and Clay. |