Lubricating oil composition

Details Lubricating oil composition Lubricating oil composition

C - Chemistry, Metallurgy

10

M

C10M 163/00 (2006.01) C10M 129/68 (2006.01)

Patent

CA 2358371

A gas-fuelled engine lubricating oil composition having a TBN in the range of 6.5 to 20 comprising an oil of lubricating viscosity in an amount of greater than 50 mass % of the composition; and additives with active ingredients present in a total amount of less than 50 mass % of the composition, said additives comprising (A) one or more metal hydrocarbyl-substituted salicylate detergents having a TBN of 95 or less; (B) one or more calcium salicylate, phenate or complex detergents, having a TBN of greater than 250; and (C) one or more dispersants. The additives may further comprise one or more anti-wear additives and/or one or more antioxidants. By addition of the combination of additives according to the invention, enhanced resistance of the gas-fuelled engine lubricating oil composition to oxidation and nitration is obtained.

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