Abstract: A lubricating oil composition comprising (A) a lubricating oil base oil the kinematic viscosity of which at 100° C. is in the range of from 1.4 to 6 mm2/s, (B) from 250 to 2000 ppm in terms of molybdenum of a molybdenum dialkyldithiocarbamate, (C) from 20 to 500 ppm in terms of sulphur of tetrabenzyl thiuram disulphide and (D) from 0.05 to 3.0 mass % of an amine. The lubricating oil composition of the present invention has a superior friction reducing effect and which has a superior fuel economy effect.