My cost per mile includes all the costs mentioned above over the time I have owned my M3W - 7,600 miles over 5 years (only used April to October). And Jalopniks cost to own a Bugatti was based over a 5 year stretch with 2500 miles a year max.
Yes, over time the number will drop as my mileage increases, but as I was told by the dealership, my M3W has had more issues than any other they have dealt with, totaling over $15k. In fact, it is at the dealership right now getting fixed again.