| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lubricant composition that has friction-reducing effect and excellent load bearing and abrasion resistance since having a high oil film strength in spite of having a low viscosity. <P>SOLUTION: The lubricant composition comprises: a mixed base oil selected from single base oils such as purified mineral oils of group 1, group 2 and group 3 defined by an API base oil category and a poly-α-olefin of group 4 alone, or their mixed base oil, and a mixture of these base oils and a base oil selected from group 5; and an organic compound having sulfur in the molecule. The lubricant composition exhibits, as characteristic values, a kinematic viscosity at 100°C of 2-30 mm<SP>2</SP>/s, a viscosity index of 95-200 and an oil film strength in which the initial seizure load (ISL) of shell 4 sphere withstand load testing (ASTM D2783 method) is≥1,260 (N). <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
