I am not so sure his business is slow, he had three Bentleys, two Rolls Royces, a Ferrari, a half dozen Jaguars and Mercedes, a couple of BMW's, a 911, and my Boxster at his shop.
I really only posted this to see what everyones opinion on this is. There does seem to be some correlation, but it is debatable what the oil change interval should be. I think 5k is the interval I will be going with from now on.
