What is the difference between Molybdenum Disulfide (MoS2) and Teflon (PTFE) in terms of Solid Lubricants?
A. Both materials are very slippery. Molybdenum Disulfide, or Moly, is a naturally occurring inert mineralization that will sustain loads in excess of 400,000 psi, while PTFE, a manufactured chemical, can only sustain loads in the 350 to 450 psi range. MoS2 remains effective up to its melting point exceeding 2,000F while PTFE forms a noxious gas near 650F. Some of this gas will invariably bypass the rings. Additionally, PTFE particle size is inconsistent and generally too large to remain in suspension in the oil. PTFE tends to “ball-up” or congeal at high temperatures, creating the possibility of plugging oil passages or pick-up screens.
