Augmenting automobiles are inducing escalation in destructive exhalations from the exhaust pipe of diesel engines. It is one of the primary agendas to explore substitute fuel for petroleum. Many researchers and diesel engine experts have concluded that biodiesel can be the suitable alternative for these circumstances. Exhaust gas recirculation (EGR) and biodiesel use have both produced a number of solid results in earlier investigations. In the current investigation, biodiesel made from rice bran was blended with regular diesel to test in a diesel engine. Biodiesel was created by the transestrification process, and B10 and B20 mixes of diesel and biodiesel were created. On a diesel engine with an EGR system fitted, these mixes were evaluated. Compared to conventional diesel, BTE rose when biodiesel was added to fuel. Fuel mix B10 was determined to have the highest BTE. Compared to biodiesel, it decreased once the EGR system was installed. For B10EGR and B20 EGR, BTE was higher than for standard diesel. While the addition of biodiesel causes NOx emissions to increase, the use of EGR causes a decrease in the same. The engine's performance and emission data showed that a diesel engine can run on rice bran biodiesel and diesel blends without requiring any engine modifications, and EGR assisted in reducing exhaust pollutants.