This is further shortened by about 1 °CA by offering the turbulence. The combustion duration of 40LFPO is longer than that of diesel because of its sluggish combustion as a result of lower cetane number and poor volatility. However, the combustion duration is shortened little by adding the DMC to 40LFPO. The combustion duration is shortened for 40LFPO10DMC with the internal jet piston.