This document studies the fuel properties of diesel-biodiesel blends with aluminum oxide nano-particles as additives. The researchers prepared blends with 20% Madhuca Indica biodiesel, 80% diesel, and 50ppm or 100ppm of aluminum oxide nano-particles. They tested the blends for properties like density, viscosity, heat of combustion and flash point according to ASTM standards and compared them to pure diesel and biodiesel. They found that the blend properties were close to diesel standards. Specifically, density and viscosity of the blends were almost the same as diesel fuel. The flash point of the blends was similar to diesel fuel. Heating values of the blends were around