@not_br549 @teknomunk @BowsacNoodle @IAMAL_PHARIUS @Paultron all true. The ever-increasing search for efficiency and emissions controls have resulted in modern high-pressure common-rail diesels being less friendly to certain bio-diesels. Some are still fine, and a B5-B10 mix is often actually an improvement over either D2 or JP8 for use in ground vehicles. But, the comparison is not head-to-head, as there is no major effort in developing specific BD engines, and instead the BD industry is trying to accommodate BD fuel to engines optimized for D2. BioDiesel Magazine is a great read if you have interest in the subject.