"gwengler" wrote:
"The fact is that the technique of operating lean of peak and power
recovery was discontinued due to the resulting increase in service
issues. Burned pistons, valves, ruined rod and main bearings were
traced to the inability of pilots to utilize this technique with the
instrumentation and distractions found in the typical general aviation
aircraft. If Lycoming felt that this was indeed an efficient and
reliable method of operation, you can be sure that it would be in our
recommended procedures."

Translation: "There's nothing really wrong with it, but Lycoming considers
most pilots too ignorant and careless to do it properly."

(Not that I necessarily disagree with this.)

Dan
C172RG at BFM