| abstract |
Providing engine oil with excellent corrosion and wear prevention performance and fuel-saving performance. The lubricating base oil contains an organic molybdenum compound in an amount of molybdenum (Mo) of 0.02% by mass or more and an alicyclic epoxy compound, preferably, molybdenum dithiocarbamate (MoDTC) as the organic molybdenum compound, Fuel-saving engine oil using an alicyclic epoxy compound having an ester bond and two epoxidized cycloalkanes, and a lubricant base oil having a kinematic viscosity at 100 ° C. of 4.5 mm 2 / s or less Composition. |