AbstractThe direct application of Jatropha biodiesel in engines is harmful because of the corrosivity of biodiesel, the emission of poisonous gases, and solid particulate matter. Therefore, it is of paramount important to enhance the biodiesel fuel properties via green routes to effectively utilize it for automotive applications. The synthesis and application of different nanoparticles (NPs) such as ZnO, Mg‐ZnO, TiO2, and SiO2, as fuel property enhancers for Jatropha biodiesel were investigated. The calorific value, oxidation stability, dynamic viscosity etc. were studied for the NP‐blended biodiesels and compared with the traditional biodiesel (B100). Mg‐ZnO was found to be a promising candidate as fuel property enhancer for biodiesels.