Patent ID: 7790659
Filing Date: 2010-09-07
Classification: C10M,C10N

Abstract:
1. A lubricating oil composition consisting of a base oil; at least one type of phosphorus compound Component (A) comprising metal salts of phosphorus compounds represented by formula (2) below; at least one type of additive selected from the group consisting of Component (C) consisting of a metal detergent consisting of an alkali metal salicylate or an alkaline earth metal salicylate, Component (D) comprising ashless dispersants comprising polybutenylsuccinimides, and Component (E) comprising anti-oxidants comprising phenol-based antioxidants and/or amine-based antioxidants; and at least one type of additive selected from the group consisting of Component (F) comprising a sulfur-containing organic molybdenum complex and Component (G) comprising an ashless friction modifier comprising fatty esters and/or amine compounds: wherein X (II) the composition contains a phosphorus compound selected from Components (A) as the main component, Component (F) in an amount of 0.001 to 0.2 percent by mass in terms of molybdenum based on the total mass of the composition, and sulfated ash in amount of 1.2 percent by mass or less; or (III) the composition contains a phosphorus compound selected from Components (A) as the main component, Component (G) and sulfated ash in an amount of 1.2 percent by mass or less; wherein the composition contains no zinc dithiophosphates and a NOACK evaporation loss of the base oil is 16 percent by mass or less.