Originally Posted by <VENOM>

and finally to the OP, why are you running 15k changes on a 65k M3, you did say you purchased the vehicles, I know BMW tells you when to change the oil, but having been around cars for years especially all the German car nuts, and especially a couple guys who run a BMW performance shop, their belief is to change the oil every 5-7k and not wait it out until 15k with the BMW recommended oil changes.