The combustion attributes of the all tested blends in this study seen to be improved with internal jet piston. The reason may be enhanced air turbulence motion by providing two holes on the piston crown [26]. The cylinder peak pressure of 40LFPO10DMC + IJP blend is the highest which is about 78.35 bar in this investigation. This is because DMC has provided oxygen and better air fuel mixing provided by the internal jet piston for complete combustion.