Patent ID: 6150309
Filing Date: 2000-11-21
Classification: C10M

Abstract:
A method for improving the dispersancy retention of a crankcase lubricant composition comprising including in the crankcase lubricant composition an oil-soluble, organomolybdenum compound and a phenolic and aminic antioxidant, wherein the phenolic antioxidant is selected from mixtures of phenols having the formula I and II: ##STR3## wherein R.sup.1 and R.sup.2 are the same or different alkyl group of from 3 to 9 carbon atoms and x and y are integers of from 1 to 4, wherein the aminic antioxidant is represented by the formula III: ##STR4## wherein R and R.sup.1 are independently alkyl groups of about 6 to about 12 carbon atoms, the molybdenum and antioxidant being present in a weight ratio in the range of about 80:20 to about 20:80.