I’ve been getting a consistent 20k+ miles out of three sets of Michelin Supersports on my 2011 M3. The original Continentals only lasted 9k miles. I’m on Sport 4S’s now; they grip and handle very well. Slightly smoother than the Supersports. I run the rears all the way to the cord and then replace all four. Can’t rotate the tires, and the fronts only have about 2/32nds left once the rears are shot. I would say I’m not nice to tires, but I don’t track this car (word used as a verb) nearly as much as the older M3.