hopefully most of you, like me, set one of the MPG counters when you got the car and never touched it again, while using the other MPG counter to do your trip or interval MPG tracking. otherwise, just give it your best guess.
after 21 months owning my 99 540i, i traded it in with the lifetime MPG of 19.1
so i was pleasantly surprised that on my 01 beast that i've had now 2.5 weeks or so, my lifetime MPG is 18.3
so three questions -
1) what lifetime MPG do you have on your M5?
2) for those with enough milage to apply, did you switch out tires before 15k or after 15k?
3) optional - if you're on either end of the extreme scale as far as city/hwy driving percentage, let us know so you don't skew the scale for us with extremely high or low MPGs (i.e. 20/80 or 80/20% city/hwy - anything less and I figure we'll all average each other out)