A lubricating oil composition is provided containing a base oil having a kinematic viscosity at 40° C. in the range of from 2 to 20 mm2/s and a viscosity index of 50 or more and a polymethacrylate, wherein the lubricating oil composition has a kinematic viscosity at 40° C. in the range of from 22 to 95 mm2/s; a kinematic viscosity at 100° C. in the range of from 10 to 30 mm2/s; a pour point of −10° C. or less; a CCS viscosity at −20 ° C. of 2500 mPas or less; and a flash point of 140° C. or more.