One thing I can positively guarantee you 100% true, for tonight and the rest
of your life....Lycoming would not have you richen up their carbs to have the
engine running sloppy rich....to facilitate "break-in" of the rings.
Aircraft engines are run richer than automobile engines on the ground and at takeoff. Not sloppy rich but a lot richer. They also have looser clearances because of the huge differances of cooling on the ground and in the air. As a result there is a lot of blowby till they get into the air and are running at operating temps. Still even without detergent oil they do not glaze if you follow their break in procedures.