Lubricating oil composition comprising zinc dithiophosphates

Details Lubricating oil composition comprising zinc dithiophosphates Lubricating oil composition comprising zinc dithiophosphates

C - Chemistry, Metallurgy

10

M

C10M 141/10 (2006.01) C10M 135/20 (2006.01) C10M 143/10 (2006.01) C10M 163/00 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2428307

A lubricating oil composition employable in combination with a low sulfur content fuel oil is preferably composed of a base oil having a sulfur content of at most 0.2 wt.%, an ashless dispersant comprising an alkenyl- or alkyl- succinimide or a derivative thereof, a metal-containing detergent containing an organic acid metal salt, a zinc dialkyldithiophosphate, a zinc dialkylaryldithiophosphate, and an oxidation inhibitor selected from the group consisting of a phenol compound, an amine compound, and a molybdenum- containing compound, wherein a ratio of the phosphorus content of the zinc dialkyldithiophosphate to the phosphorus content of the zinc dialkylaryldithiophosphate is in the range of 20:1 to 2:1.

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