The ignition delays for the PCSO were longer and the start of
injection timing was earlier than for PBDF. The difference in the average brake torque was
a decrease of 1.36% for PCSO though this was statistically insignificant. The brake specific
fuel consumption increased by almost 5% more or less in proportion to the difference in
calorific value, so that the 1.06% increase in thermal efficiency was again statistically
insignificant.