Abstract: A low emissions, high oxidative stability crankcase lubricating oil formulation which is prepared from a base stock which comprises at least one synthetic ester selected from the group consisting of: polyol esters, synthetic esters having between 5-35% unconverted hydroxyl groups, based on the total amount of hydroxyl groups in the polyol, and synthetic esters combined with at least one additional functional group which is capable of increasing the polarity of the functionalized synthetic ester, wherein the base stock has an oxygen, nitrogen or halogen content of at least 15 wt. %, based on the total weight of the base stock; and a lubricant additive package.
September 21, 1995
Date of Patent:
October 7, 1997
Exxon Chemical Patents Inc
Richard Henry Schlosberg, Walter Weissman, Maciej Radosz, Gerald Dennis Dupre', Ralph Donald Gray, Jr., John Eric Johnston, Patrick Edward Godici, Richard Samuel Polizzotti, Lawrence Harold Kaplan