Ethanol in its pure form can be used as a fuel for vehicles, but like biodiesel, it is usually mixed with petroleum to produce a blended motor fuel. By blending ethanol and petroleum it oxygenates the fuel mixture, meaning it will burn more completely, thus reducing the amount of harmful emissions. Ethanol fuel blends are available in a number of different blend levels. The names indicate the percentage of ethanol the fuel contains, with E10 containing 10% ethanol and E85 containing 85% ethanol. The most common blend is E10, which is available at more than 600 service stations nationally. E85 is offered through a smaller number of fuel outlets, targeting specialised vehicles.