Patent ID: 8148306
Filing Date: 2012-04-03
Classification: C10M,C10N

Abstract:
1. A method of lubricating a transmission comprising supplying thereto a composition which comprises: (a) a major amount of oil of lubricating viscosity; (b) an amide or thioamide represented by the formula wherein X is O or S, R 1 and R 2 are each independently hydrocarbyl groups of at least 6 carbon atoms, and R 3 is a hydroxyalkyl group of 1 to 6 carbon atoms or a group formed by the condensation of said hydroxyalkyl group, through a hydroxyl group thereof, with an acylating agent; (c) a nitrogen-containing dispersant; and (d) a phosphorus-containing compound, provided that the composition contains less than 0.1 percent by weight of a zinc dialkyldithiophosphate.