Oh I get, and approve of, LOP ops, its just kinda hard for me seeing running that low AFR with an engine loaded above 50%-60%. I am trying to change that however..There is less wear because everything runs cooler. Running this lean in cruise, it's actually hard to get CHTs in a good place in cooler weather. No detonation because cylinder pressures are low with the mixture this weak. Oil temps down as well as are carbon and lead deposits. You should not run LOP above 75% power, that part is important.
Too many people equate lean to bad. Running at 50 ROP to peak is not good but at least 75 LOP and everything is happy.
Anything above 4000 feet MSL @ 2500rpm and say 150 LOP, and you'll be below 75% and can safely run LOP. At that setting the lean mixture will drop power about 8-12% from best power mixture. This, combined with the reduced rpms and MAP, even at WOT will put you in a safe cylinder pressure zone- out of the "red box" so to speak.
The injected R3350TC engines in airline service were regularly getting over 3000 hours time on wing running LOP back in the mid '50s. The idea is well proven but only recently re-discovered for opposed engines maybe 10-15 years ago. There's still reluctance to the idea from many locked in the old mindset though.