Originally Posted by glockperfect
It boggles my mind that some folks would spend $70k on a car and then ignore recommendations for driving in the first 1200 miles. Because, yea, they probably know a lot more about the engine than BMW's engineers...
I gotta agree with this statement but to each his own. My understanding is that the break-in oils are non-synthetic and not quite as friction reducing as the post break-in oils. I'm sure that the break-in oils have very good pour-point and pressure resistance numbers and also have most of the essential additives of a modern engine oil. They probably just allow a little more wear than the synthetics.