"Premium diesel" does not really exist in the way that premium gasoline does. Chevron, Shell, etc.. all have proprietary blends that they had to their gasoline, however it's different story with diesel. As diesel is mostly sourced from one or two suppliers for a given area. You'll even notice a little sticker on the side of Chevron pumps that say something like "this diesel fuel is not a certified Chevron product". I don't focus on finding the best name brand fuel and expect quality as I've purchased **** diesel from Shell more than once, focus on the stations that tend to have high volume of traffic. Where are all the other diesel owners filling up at? you have a much better chance of getting clean, fresh, uncontaminated fuel that way. Otherwise the only difference is diesel #1 (winter blend) which has less paraffin (less energy/ounce) that doesn't wax up in cold temps.