Patent ID: 6972084

Claim:
A fuel oil composition for diesel engines comprising a base stock which satisfies the following relationships (1), (2) and (3), contains sulfur at 0.05 wt. % or less, and is incorporated with 0.01 to 0.10 wt. % of a flow improver and 0.002 to 0.1 wt. % of a lubricity improver: ( a ) 0 <A ≦4.0 (1) wherein, A is content (wt. %), based on the total normal paraffin compounds present in the base stock, of normal paraffin compounds having a carbon number of 20 or more, ( b ) 0.04 ≦[B/C]≦ 0.40 (2) wherein, B is content (wt. %) of normal paraffin compounds having a carbon number of (n+5), C is content (wt. %) of normal paraffin compounds having a carbon number of (n), [B/C] is average B/C ratio, and (n) is a positive integer when total content of normal paraffin compounds having a carbon number of (n) or more is 3.0 wt. % or less and closest thereto, based on the total normal paraffin compounds in the base stock, and ( c ) 0 <D≦ 8.0 (3) wherein, D is content (vol. %), based on the whole base stock, of polynuclear aromatic hydrocarbon compounds.