It is my opinion that, while moly grease is highly desirable in some applications, close tolerances and/or high speeds are not conditions in which it performs well. The moly itself is a solid and can act as an abrasive. I have also seen reports that state that it can cause roller bearings to slide instead of roll. Moly performs best in applications that involve loose tolerances, low speeds and limited motion where fretting is a problem. Ball joints and tie rod ends would be good examples.