Remember to change your oil at a reasonable interval! This is what happens when you don't change your oil for 60k miles: http://jalopnik.com/5415431/what-ha...nge-your-oil-for-60000-miles?skyline=true&s=I It kind of makes you think that if it's that bad at 60k, then how bad it could be when you follow the dealer recommended 15k for newer Bimmers...