| abstract |
In CVT or the like, vibration and noise generated between a pulley and a chain or between a pulley and a belt are suppressed while increasing a friction coefficient between metals. A lubricating oil composition includes a base oil, an alkaline earth metal detergent (A), a phosphite (B1), a phosphate amine salt (B2), and an acidic phosphate ( B3), an aliphatic monoamine (C1), and an aromatic monoamine (C2). [Selection figure] None |