LUBRICANT BASE OIL, METHOD FOR PRODUCTION THEREOF, AND LUBRICANT OIL COMPOSITION

摘要

Disclosed is a lubricant base oil which has an urea adduct value of 4 mass% or less and a viscosity index of 100 or more. Also disclosed is a method for producing a lubricant base oil, which comprises the step of subjecting a raw oil containing normal paraffin to hydrogenation/hydrogenation-isomerization so that a product of the treatment has an urea adduct value of 4 mass% or less and a viscosity index of 100 or more. Further disclosed is a lubricant oil composition comprising the lubricant base oil.