Hydrocracking of pure petroleum vacuum distillate and the same fraction containing 5 wt.% of rapeseed oil was carried out at 400 and 420 degrees C and under a hydrogen pressure of 18 MPa over commercial Ni-Mo catalyst. Reaction products were separated by distillation into kerosene, gas oil and the residue. Fuel properties of fractions suitable for diesel production were evaluated (gas oils and remixed blends of kerosene and gas oil). Gas oils obtained from co-processing showed very good fuel properties as the remixed distillates did. Gas oil obtained from co-processing at 420 degrees C showed also reasonable key low-temperature properties (cloud point: -23 degrees C, CFPP: -24 degrees C) similar to those of gas oil obtained from pure petroleum raw material processing. (C) 2009 Elsevier Ltd. All rights reserved.