A low sulfur and low phosphorus lubricating oil composition

Details A low sulfur and low phosphorus lubricating oil composition A low sulfur and low phosphorus lubricating oil composition

C - Chemistry, Metallurgy

10

M

C10M 141/00 (2006.01)

Patent

CA 2567263

The present invention is directed to a low sulfur and low phosphorus lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity and (b) one or more dispersants (c) one or more anti- oxidants and (d) one or more detergents, wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds. The present invention is also directed to a low sulfur and low phosphorus lubricating oil composition comprising (a) an oil of lubricating viscosity (b) a borated dispersant and a non-borated dispersant (c) a molybdenum anti-oxidant and a phenolic anti-oxidant and (d) a high overbased and a low overbased calcium sulfonate, wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non--alkylated aromatic amines and tri-nuclear molybdenum compounds. The present invention is also directed to method for lubricating internal combustion engines, which comprises lubricating the engine with a low sulfur and low phosphorus lubricating oil compositions of the present invention.

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