Lubricant oil composition

A lubricating oil composition, comprising:

• a base oil;
• and
• a copolymer comprising a structural unit derived from a monomer having a (meth) acryloyl group and a linear or branched alkyl group having 6 to 24 carbon atoms, a structural unit derived from a monomer having a (meth) acryloyl group and a polar group, a structural unit derived from a monomer having a (meth) acryloyl group and a cyclic structural group,
• wherein a content of the structural unit derived from a monomer having a (meth) acryloyl group and a cyclic structural group is in a range of from 7 to 30 mol % based on all structural units of the copolymer, the copolymer has a mass-average molecular weight in a range of 5,000 to 50,000, a content of the copolymer in terms of resin content is in a range of 0.10% by mass to 2.5% by mass based on a total amount of the lubricating oil composition, and the lubricating oil composition has a 100° C. kinematic viscosity of 8.2 mm2/s or less.