This 328 is the first BMW I've owned.......so, I'm wondering about the rev's. when I rev the RPM's up, it is fine, revs fast as expected. After I let off the accelerator, the RPM's just kind of hang........they come back down pretty slow. Is that normal for the 2.8 on a 5 speed? It isn't a problem, just strange. I figured maybe the BMW's have a heavy flywheel.