Patent ID: 8088720
Filing Date: 2012-01-03
Classification: C10M,C10N

Abstract:
1. A method of making a lubricant composition having improved wear protection and reduced phosphorus emissions comprising premixing additives comprising effective amounts of ZDDP, a polyol ester having a viscosity of 100° C. in the range of about 2 to about 4 cSt and at least one additional additive; heating the ZDDP, the polyol ester and the least one additional additive in the temperature range of about 30° C. to about 80° C.; and, adding said premixed additives to a major amount of base oil, wherein the ZDDP is selected from the group consisting essentially of primary ZDDPs, secondary ZDDPs and mixtures thereof and wherein said polyol ester is a tetramethyl propionate polyolester.