Lubricant compositions for internal combustion engines

Details Lubricant compositions for internal combustion engines Lubricant compositions for internal combustion engines

C - Chemistry, Metallurgy

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C10M 141/10 (2006.01) C10M 141/12 (2006.01) C10M 161/00 (2006.01) C10M 163/00 (2006.01) C10M 167/00 (2006.01) F02F 3/00 (2006.01) F02B 75/02 (2006.01)

Patent

CA 1334667

In accordance with the present invention, there are provided low sulfated ash lubricating oil compositions which comprise an oil of lubricating viscosity as the major component and as the minor component (A) at least about 3 wt% of at least one ashless nitrogen- or ester-containing dispersant, (B) at least about 2 wt% of at least one sulfurized alkyl phenol, and (C) at least one metal dihydrocarbyl dithiophosphate wherein the hydrocarbyl groups contain an average of at least 6 carbon atoms, and wherein the lubricating oil is characterized by a total sulfated ash (SASH) level of from 0.01 to about 0.6 wt% and by a SASH:dispersant wt:wt ratio of from about 0.01 to about 0.2:1.

578233

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