Technical Paper
The Impact of Organomolybdenum Compounds on the Frictional Characteristics of Crankcase Engine Oils
1993-10-01
932779
To enhance the “Energy Conserving” (EC) performance of crankcase engine oils, the friction reducing capabilities of several oil-soluble organomolybdenum (OM) compounds were evaluated in formulations containing different base oils and viscosity index improvers (VIIs). Using a Cameron-Plint TE 77 Reciprocating Friction Machine, operating under boundary lubrication conditions, OM additives reduced friction coefficients by almost 80%. Frictional force reductions were sensitive to temperature and the apparent “solvency” of the base oil employed in the formulation. Optimum performance was generally observed in base oils of “poorer” solvent quality (high Viscosity Index or high saturate content) or in conventional mineral oils at temperatures above 100°C.
