High napthenic content distillate fuel compositions

A diesel boiling range composition comprising a T90 distillation point of 375° C. or less, a naphthenes to aromatics weight ratio of 2.5 or more, an aromatics content of 4.5 wt % to 18 wt %, a cetane index of 55 or more, a density at 15° C. of 810 to 835 kg/m3, and a sulfur content of 10 wppm or less.

A diesel boiling range composition comprising a T10 distillation point of 250° C. or more, a T90 distillation point of 375° C. or less, a naphthenes to aromatics weight ratio of 1.6 or more, an aromatics content of 4.5 wt % to 25 wt %, a cetane index of 55 or more, a density at 15° C. of 810 to 835 kg/m3, and a sulfur content of 10 wppm or less.

A method for forming a diesel boiling range composition, comprising:

• fractionating a crude oil comprising a final boiling point of 550° C. or more to form at least a diesel boiling range fraction, the crude oil comprising a naphthenes to aromatics volume ratio of 1.6 or more and a sulfur content of 0.2 wt % or less, the diesel boiling range fraction comprising a T90 distillation point of 375° C. or less;
• and
• hydrotreating the diesel boiling range fraction to form a hydrotreated diesel boiling range fraction comprising a naphthenes to aromatics weight ratio of 1.6 or more, an aromatics content of 4.5 wt % to 22 wt %, a cetane index of 55 or more, a density at 15° C. of 810 to 835 kg/m3, and a sulfur content of 10 wppm or less.