quote:Hmmm... This was what I thought I understood from other sources over the past several years. I posted a question specifically about this issue last week and was informed by this forum's resident experts that the moly was in solution, not suspension, and -couldn't- settle out. Whatever the truth in this matter, I have noted -something- of a finely dispersed solid in the bottom of oil bottles occasionally when I neglected to give the bottle a good, rigorous shake prior to pouring the contents out. This seems to be more likely for oil I've had sitting around more than a couple of months. Chemically the moly is in the form of a molybdenum salt. The anti-wear compounds, Zinc Dithiophosphate and its related compound, Zinc di-dithiophosphate, are other examples of salts. Salts, while readily miscible in water, aren't generally dissolvable in organic liquids, so I had assumed that these compounds were ground extremely fine and added to the oil to permeate about in suspension (leastways until they settled out over time...). Anyway, "ramair8", thanks for posting. Looks like the thinking caps are gonna hafta come out around here! -Ray Haeffele [ January 28, 2003, 10:57 AM: Message edited by: Ray H ]
Originally posted by ramair8: "...Moly is a solid, specifically banned by Cummins, due to excessive valve train wear. Moly (Molybdenum Disulfide) is a processed mineral that is similar in appearance to graphite. Moly has good lubricating properties when used either by itself (in dry power form or as an additive to oil or other lubricants). Particles of the Moly can come out of suspension and agglomerate [emphasis mine - RH]..."