By the transesterification approach in the presence of a catalyst and alcohol, renewable alternative fuel was created from waste oils in this study. In line with ASTM, the significant features of the manufactured biodiesel were investigated. It was possible to buy gasoline blends like D100B0 (100% diesel), D80B20 (20% biodiesel), D 70B30 (30% biodiesel), D60B40 (40% biodiesel), D50B50 (50% biodiesel) and B100 (100% diesel). The results showed that B20 had a slight difference in viscosity, density, and calorific value when associated to diesel energy. Overall, the B20 blend had more favorable characteristics, and it may be suggested as a gifted renewable substitute to diesel. [ABSTRACT FROM AUTHOR]