I purchased a CPO'd '08 E91 last May. Last June, I had the oil changed at the dealer and they reset the oil service indicator. Since June, I've put about 6500 miles on the car (I drive a lot) and the oil service indicator reads 12,000. Shouldn't it read closer to 8500? Since I plan to do 7500 mile oil changes on this car (along with 2 year brake fluid flushes), I'm not really concerned with what the CBS indicates, but shouldn't it reflect mileage reality?