Lubricant composition

Details Lubricant composition Lubricant composition

C - Chemistry, Metallurgy

10

M

C10M 139/00 (2006.01) C10M 135/00 (2006.01) C10M 135/18 (2006.01) C10M 137/10 (2006.01) C10M 141/10 (2006.01) C10M 163/00 (2006.01)

Patent

CA 2157425

A lubricant composition comprising a major amount of a lubricant base oil, and a minor amount of additives comprising (A) oxymolybdenum dithiocarbamate sulfide having a specific structure, (B) zinc dialkyldithio- phosphate having a specific structure, and (C) a sulfur compound having a specific structure, (D) a metal cleansing agent, and (E) boron containing succinimide, wherein to the total weight of the composition, the molybdenum content from oxymolybdenum dithiocarbamate sulfide is at 200 to 2,000 ppm; the phosphorous content from zinc dialkyldithiophosphate is at 0.02 to 0.15 % by weight; the sulfur content from sulfur compounds is at 0.02 to 0.30 % by weight; the content of a metal cleansing agent is at 1 to 10 % by weight; and the boron content from boron containing succinimide is at 0.005 to 0.06 % by weight. The lubricant composition of the present invention with excellent low abrasion property can sustain good friction properties while exhibiting resistance to oxidation at higher temperatures in the presence of gaseous nitrogen oxides. The lubricant composition of the present invention is used preferably as lubricants for internal combustion engines, automatic transmission, snubbers, and power steering, more preferably as lubricants for internal combustion engines in particular.

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