Petroleum diesel weighs around 6.943 lb/gal (0.832 kg/l), or about 12 percent more than ethanol-free gasoline. Fractional distillation of crude oil at temperatures of 392 to 662 degrees Fahrenheit results in diesel fuel, which is roughly 86.1 percent carbon
Other types of diesel fuel, such as synthetic diesel and biodiesel, are measured in a similar manner. The cetane number, or measure of the diesel fuel's delay when ignited, determines the quality, and thus the pricing, of fuel. The primary uses for diesel fuel today are heating, commercial vehicles, agricultural vehicles and locomotives.