Patent ID: 6444624
Filing Date: 2002-09-03
Classification: C10M,C10N

Abstract:
An SAE 0W-30 or 5W-30 or 5W-20 multigrade compression-ignited engine lubricating oil composition having a Noack volatility of less than 15% mass loss according to CEC L-40-A-93 and a merit of at least 65 in the VWTDi test according to CEC-L-78-T-97, said composition comprising, or being made by admixing, a major amount of(A) a basestock of lubricating viscosity that contains from 0 to less than 10 mass % of a Group I basestock or a Group II basestock or a mixture of Group I and Group II basestocks, other than basestocks that arise from provision of additive components in the composition; and minor amounts of additive components comprising (B) one or more molybdenum-containing additives in an amount providing not greater than 1000 ppm by mass of elemental molybdenum, in the composition; (C) one or more calcium detergent additives comprising a calcium salt of an organic acid as a surfactant, in an amount or amounts providing at least 10 m moles of surfactant per kilogram of the composition; (D) one or more other lubricant additives selected from ashless dispersants, metal detergents, anti-oxidants, anti-wear agents, and friction modifiers, provided that said other lubricant additives are different from additives (B) and (C) above; and (E) one or more viscosity modifiers, the additive components providing less than 100 ppm by mass of chlorine to the composition.