The engine combustion products were measured and analyzed based on emissions of exhaust. Due to the utilization of a variety of fuels, such as petroleum diesel and bio-diesel in die-sel-generated engines, they emit pollution-insecure emissions. To explore this emission quan-tity, a numbers of experiments were conducted utilizing a single-cylinder engine, Land Curs-er six-cylinder, Mazda WL31 engine mechanical biodiesel vehicle and In-Line engine. The performance research was given for the data acquired from the Mazda WL31 four-cylinder engine. Landcom III gas analyzer was used to sense and record the exhaust gas emissions from the burning of diesel fuel, which was utilized for data analysis. Various gas discharges and their constituents were independently analyzed. The results of the test show that the harmful emissions of biodiesel fuel are much lower than the emissions of fuel made from mineral oil.