This research was conducted to study the efficacy and composition engine exhaust YAMAHA YZF R6, led by oil, gas, gasohol 95 Gasoline 95 Fuel E20 and fuel E85, which oil above the oil that is sold in the market. The research has led to the installation of the engine to the chassis of a Formula Student. Then connects to the chassis dynamometer. The test will begin at around 1700 rpm and a 2500 4000 5000 6000 7000 8000 and 9000 rpm, respectively. The engine's throttle is fully open throughout the experiment. The trial to use gears six of the engine. Then picking up on the chassis dynamometer. The pollution exhaust and the rate of fuel consumption. Then bring those values to analyze the results to determine performance and pollutant emissions of the engine YAMAHA YZF R6