Biodiesel fuel as an alternative fuel for diesel engine has a great possibility to solve the problem such as air pollution caused by exhaust gas emission of the automobile. In this study, the usability of non-esterfied biodiesel fuel as alternative fuel is investigated in an indirect injection diesel engine. New concept biodiesel fuel has no glycerin generated by esterfication process and reduces the 20% of cost because of no use of methanol in the production process. Experiments were conducted by using the four blends with different volumetric percentage of biodiesel (0, 20, 50 and 100) in baseline diesel fuel. The smoke emission of biodiesel fuel was reduced in comparison with diesel fuel, but power and brake specific energy consumption was similar to diesel fuel