Lubricating oil composition

A lubricating oil composition, comprising:

• (A) a base oil;
• (B) at least one selected from the group consisting of a sulfur-comprising compound of formula (I) and formula (II):
• wherein:
• R1 to R12 are each independently is a hydrogen atom;
• a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and an aryl group;
• or a hetero atom-comprising group comprising an atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom, which is contained a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, and an aryl group;
• each Y is independently a divalent group selected from the group consisting of —O—, —S—, —SO—, —SO2—, —(C═O)O—, —(C═O)NH—, —O(C═O)NH—, —C(═O)—, —N(H)—, —NHCONH—, —N═N—, —NH—C(═NH)—NH—, —S—C(═O)—, —NH—C(═S)—, and —NH—C(═S)—NH—;
• x is an integer from 1 to 3;
• and
• each n is independently an integer from 1 to 5;
• and
• (C) a polar group-comprising compound comprising at least one polar group selected from the group consisting of an amino group, an amide group, and a hydroxyl group, and which comprises a C3 to C24 alkyl group.