First of all, low-sulphur diesel is essentially a new product that basically starts June 1 for on-road vehicles. It hasn't been extensively tested with biodiesel, for example, so we're not exactly sure how that's going to work out. It's not the same as testing it with 500 parts per million, so it's something that lies ahead of us to test out, to make sure....
Even on its own, very low-sulphur diesel does tend to reduce the lubricity of the fuel, so we need to find out if we have to make any adjustments to make sure the low-sulphur diesel performs in the vehicles--in the trucks--to the same degree it did before.