Patent ID: 9029305
Filing Date: 2015-05-12
Classification: C10M,C10N

Abstract:
1. A lubricating oil composition comprising a base oil which comprises a mineral oil and/or a synthetic oil, and, compounded therein, (A) at least one phosphorus-containing compound selected from the group consisting of mono-n-butyl acid phosphate, mono-2-ethylhexylacid phosphite, and mono-2-ethylhexyl acid phosphate, and (B) at least one tertiary amine compound selected from the group consisting of tri-n-hexylamine and tri-n-decylamine, wherein a phosphorus content of the phosphorus-containing compound of component (A) is 0.02%-0.12% by mass based on the total mass of the lubricating oil composition; a nitrogen content of the tertiary amine compound of component (B) is 0.005%-0.04% by mass based on the total mass of the lubricating oil composition, and a mass ratio of said phosphorus content of the phosphorus-containing compound of component (A) to said nitrogen content of the tertiary amine compound of component (B) is 3:1 to 4:1.