[bigjae1976]

It would make sense a new car would be slightly down on power.

Every BMW I've driven gets significantly better fuel economy after a couple thousand miles. Things need to wear in - rings, bearings, anything rotating against a seal, springs, etc. Then there's a transmission and diff too. And it's all expanding and contracting under heat/cool cycles.

Then the block needs to be "seasoned" and exposed to lubricants, heated and cooled.

Hence the reason for the break in service and driving recommendation which, if you did an oil analysis, would have high content of metals from the rings, bearing and various surfaces.