I now have 28k on my Dunlops. There is not much life left on the rears, still plenty of tread on the front ... I must be too easy on the car.
Given the time of year, though, I won't be driving many miles between now and March, unless we get no snow this year (unlike last year).
I'll be putting the snow tires on the 540i/6 next weekend in preparation for a trip north to Toronto on Thanksgiving ... hitting snow that time of year is fairly standard in the trip through Buffalo and the 540 gets most of the driving between now and March ... sigh.
Close to decision time on Tirerack -- for both the M5 and 540 -- both sets of summer tires are just about done, and will be replaced for the spring.