Patent ID: 6809069
Filing Date: 2004-10-26
Classification: C10M,C10N

Abstract:
A lubricating oil composition which comprises (1) a lubricating base oil, (2) a sulfonate, phenate or salicylate of an alkaline earth metal in an amount such that an amount of metal is in a range of 1,000 to 3,500 ppm by weight, (3) an ashless dispersant, (4) a phosphorus-based compound, wherein phosphorus is present in an amount of 0 to 100 ppm by weight, and (5) at least one additive selected from the group consisting of dispersant, antioxidant, extreme pressure agent, copper inactivator, pour point depressant, friction modifier, defoaming agent and viscosity index improver, which composition has a friction coefficient between metals of 0.12 or higher at âˆ’20Â° C. as measured in accordance with a block-on-disk test.