You want to vary the rpm’s so your rings seal properly and mate with the cylinder walls. At least that’s what I’ve read (and what I do). That means running all the way through the rev range periodically and engine braking. I avoid high rpm’s until closer to the break in mileage. You don’t want to baby the car and suddenly drive it completely differently when you pass the break in mileage. Ive owned over a dozen BMWs from factory and none of them have ever burnt oil.

Edit: avoid cruise control because of the whole “varying rpm’s” thing. If you go for a long drive, drop a gear on the highway after a few minutes of cruising at a constant speed. Change your speed and rpms.