We never operate our normally aspirated IO360 above 75%, but do lean quite aggressively. If Deakin's statement is true, would we be better running AT LOP or are we going to risk damage to the exhaust?
As I said earlier I would only run at LOP if I could monitor every cylinder. If I could I definitely would. If I couldnt then I would run rich. I cant understand the logic in risking the engine when an overhaul is going to cost you way more than the extra fuel - unless of course it is not your engine - and then I would be very upset that you treated my engine with so little respect, but understand many do.
A CHT and EGT monitor on each cyliner is not a costly piece of kit and the risks in MO of running LOP with a miss behaving cylinder and not knowing are too great.