I always do the first oil change in the 1,000 - 2,000 mil area. I have done some oil analysis and, as you suspect, the engine wear in the first 2,000 miles duting break-in is considerably higher than subsequent miles.

I then change the oil every 7,500 miles.

Now, if it is a lease vehicle, or if you plan to get rid of it before it gets 75,000 - 100,000 miles on it, the BMW-specified oil change intervals will do just fine.

But if you plan on keeping it for many years and more than 100,000 miles, the BMW spcified oil change intervals will shorten engine Life.