There is no unlocking of power at 1,200 mile service.
Reasearch break in - everyone has a belief. You have Porsche on one side, this guy in the middle,
https://www.enginelabs.com/news/disp...mance-academy/, to this guy
http://www.mototuneusa.com/break_in_secrets.htm.
Oh and here is one in the middle with some real interesting results.
https://www.motorcyclistonline.com/b...in-myth#page-3
Here are some facts
1 you are new to the car, don't go crazy and kill yourself
2 easy on the brakes for first few hundred miles
3 don't miss your 1,200 mile appt.
4 always make sure engine is at temp before getting on it.
Me? I personally think babying the engine is the worst thing you can do and that the recommendations in the manual are written with lots of help from the BMW legal team (see #1). Oh yea, in all my years on these boards I've never seen a person write "I was hard on my engine in the first 1,200 miles and I regret it" but that's just me
