Lubricating oil composition
OwnerJuliet V. Walker, Ian A. Bellinventors
Life of this patent
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Abstract
An SAE OW-30 or 5W-30 or 5W-20 lubricant has a Noack volatility of less than 15, optionally an M-111 fuel economy of 1.5% or less, and a chlorine content of less than 100 ppm. The lubricant comprises a basestock containing from 0 to less than 10% Group I and/or Group II basestocks, a molybdenum additive providing not greater than 1000 ppm of molybdenum to the lubricant, a calcium detergent providing 10 or greater mmoles of surfactant per kilogram of lubricant, one or more other additives, and a viscosity modifier.
Claims14
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.
Dependencies are inferred from the claim text.