Patent ID: 6605572
Filing Date: 2003-08-12
Classification: C10M,C10N

Abstract:
A lubricating oil composition, comprising:(A) a base oil; and (B) a boron-containing compound represented by the formula â€ƒwherein in Formulae (B-I), (B-II) and (B-III) each R is independently an organic group and any two adjacent R groups may together form a cyclic group; the lubricating oil composition containing sulfur, boron and optionally phosphorus with the ratio of sulfur to boron to phosphorus being represented by the formula S1+5B1+3P1>0.35 â€ƒwherein S1 is the concentration in percent by weight of sulfur in the composition, B1 is the concentration in percent by weight of boron in the composition, and P1 is the concentration in percent by weight of phosphorus in the composition; the concentration of sulfur in the lubricating oil composition being from about 0.01% to about 0.25% by weight; the concentration of phosphorus in the lubricating oil composition being up to about 0.08% by weight.