I wonder about the effect of LOP on muffler life. I used just the
low-power-operate-at-peak philosophy and my 172 went thru the muffler
internal flame tubes every 450 hrs, like it could read the hour meter.

As posted before, the head honcho at Dawley Aviation (the exhaust
system folks in Burlington, WI) told me personally that running lean of
peak has been the best thing that EVER happened to their business.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"