The lightest of the middle distillates has two functions; as jet fuel (or kerosene) and as blend stock for heavier gas oil fractions. When used as jet fuel its key characteristics are its low sulfur content, smoke point and freezing point. These same characteristics are also valuable when it is used as blend stock to enhance the cold-weather properties of gas oil. It can also be used as a fuel for home heating or as a clean burning fuel in domestic appliances. Petro Rabigh produces 48 MBD of jet kerosene which can easily blend with gas oil to maximize the diesel pool.