Congratulations. That was quick. They probably had a new engine waiting for you all the time.
Don't bother running it in. Why change the habit of a lifetime. Go on, rev it to death red. It will be interesting to find out if it will last the remainder of the lease period.
On a serious note, I kept my revs below 4000 rpm for the first 1000 miles, then changed the oil + filter and canned it. But as you don't have this grace period, can it from tomorrow! It'll go BOOM! for the next owner. So what?
