Abstract : Diesel engines are widely used in transportation, power, and industrial sectors due to their greater reliability, durability, and sturdiness compared to gasoline engines. The rapid population growth critically impacts petroleum reserves, leading to resource depletion. Consequently, the increasing demand for energy necessitates the immediate development of alternative renewable fuels. The B20 (Palm stearin) with Multiwall carbon nano tube blend was uniformly mixed using an ultrasonicator. The exp