Viperdoc wrote:

I've heard a lot of different advice on breaking in a new engine- run at
full power, don't run at any power for a long period of time, vary the power
settings (MP and prop), etc. Any advice? When do you switch back to regular
detergent oil?

Lycoming should have sent a copy of their recommended procedure with
the engine. If not, I'd get on them to give you a set of guidelines so
that if there is a failure during the breakin period they can't tell
you that you used the incorrect procedure.

Craig C.