Used sunflower oil was blended with grade No. 2-D diesel fuel at a rat
io of 20 / 80 (v / v). The fuel blend was tested in a diesel engine wi
th a precombustion chamber at speeds between 1200 and 2100 rpm. The fu
el blend and the diesel fuel were rated according to standard test met
hods. It was found that for short-term use the fuel blend has characte
ristics similar to those of the baseline diesel fuel and that it displ
ayed less smoke emission than the diesel fuel.