Diesel Engine Is the Essential Wellspring of Fuel Utilization Around the World. Diesel Is a Petroleum Product and Is Relied Upon to Get Over By 2050. Diesel Is Observed to Be Reliable, Durable and Efficient. Biodiesel Like Lemon Grass Oil Can Assume an Indispensable Job In Such Condition. Blends of Diesel With Biodiesel Are Relied Upon to Give Better Productivity and Emission Attributes. Expansion of Nanoparticles Like Cerium Oxide Can Make Biodiesel Progressively Powerful. Performance of a Diesel Engine Relies on Different Parameters Like Fuel Amount Infused, Fuel Injection Timing, Fuel Injection Pressure, Shape and Size of Ignition Chamber and Nozzle, Fuel Spray Pattern, Air Whirl, and So On. the Utilization of Biodiesel Can Diminish Diesel Fuel Utilization and Emission of Diesel Engine, In Light of the Fact That Biodiesel Has Been Considered As a Potential Alternative Fuel For Ci (Compression Ignition) Engines. Out of Numerous Biodiesels Got from Different Resources, Present Investigation Manages Utilization of Used Temple Oil Have Been Considered As Fuel For Examination. the Transesterification Procedure Was Embraced to Condition the Raw Oil to Suit Its Properties. Properties Are Assessed Concurring Astm Standard and Properties Are Observed to Be Calculable With Diesel. the Present Work Used Temple Oil Biodiesel Twists Are Utilized to the Run the Single Chamber Four Strokes Diesel Engine at Various Injection Opening Pressure. to Streamline the Three-Opening Pressure, Tagu ...