Patent ID: 6649575
Filing Date: 2003-11-18
Classification: C10M,C10N

Abstract:
A lubricating oil composition comprising(A) an oil of lubricating viscosity, in a major amount; (B) a nitrogen-containing lubricating oil dispersant, in a minor amount; (C) a nitrogen-free lubricating oil dispersant, in a minor amount; (D) a metal dihydrocarbyl dithiophosphate, in a minor amount; (E) a hydrocarbyl-substituted carboxylic acid or derivative thereof, in a minor amount; and (F) a metal detergent, in a minor amount, wherein the mass:mass ratio of (B) to (C) in the composition is 0.4:1 or greater, and the composition contains 0.075 or less mass % of phosphorus, expressed as elemental phosphorus.