Diesel fuel has been the main choice of transportation and industry transport services, as well as regular consumers for decades. This is due to fact diesel engines last longer than spark-ignition engines in demanding applications and the diesel fuel offers a greater power density than other fuels, therefore packing more power per volume. The farming and construction industries benefit greatly from the efficiency and high power. Refined from crude oil, diesel fuels tend to produce many harmful emissions when burned. The cost for more power has been harmful pollutants to the environment and as such, Australians had taken more interest in alternative fuels in recent times. Among the most popular has been biodiesel.