BASE OIL FOR DIESEL ENGINE FUEL OIL AND FUEL OIL COMPOSITION CONTAINING THE BASE OIL

摘要

PROBLEM TO BE SOLVED: To provide a base oil for a diesel engine fuel having properties necessary to exhibit the lubricity improving effect of a lubricity improver and a diesel engine fuel oil prepared by adding a lubricity improver to the base oil. SOLUTION: The base oil has the properties: a sulfur content of 0.03 wt.% or below, a nitrogen content of 35 wt. ppm or below, a density of 0.835 g/cm3 or below, and a solubility parameter of 7.00-8.10. The fuel oil composition is prepared by adding a lubricity improver to the base oil.