There's been a lot of discussion on here about the merits of running LOP and ROP to varying degrees but I'm interested to know what you guys think about doing neither ie running at peak EGT? I notice in the POH for the PA-32R-300 which has an IO-540 engine, the performance charts for economy cruise, range and endurance, are all based on 'mixture leaned to peak egt'. The performance cruise chart says to use 'mixture leaned to 100deg rich of peak EGT at 75% power and below'.
These are based on standard issue ex factory Lance with single probe EGT.
Any comments on the merits of these performance charts..? All I've ever heard of is leaning to peak EGT, then either leaning further to LOP or leaning less to ROP but never staying at peak EGT.