21.7 mpg! I haven't seen those numbers since my Ed followed by pcd, the memories. Enjoy it, you will become accustomed to 13-14mpg for the rest of its life. The only real criticism I have about my m3 is the gas mileage, it's atrocious.
One of the best parts of the pcd is going on the concrete roundabout with the sprinklers on and switching off the traction control. Did that with Donnie, what a blast.