I have a Z4 M Coupe, and obviously is has the S54 B32. I am wondering as to when the Engine comes into its own and is no longer "green". I have done a few 0-60 and 1/4 mile runs and the times aren't right, shall we say. Since not many Z4 M's have much mileage yet. I was wondering if one of you E46 M3 guys could assist.