[QUOTE]Leaning any Lycoming or Continental engine at or below 75 % power is permitted at any altitude[/QUOTE
Most of my flights involve cruising around at 1000 ft MSL, as soon as I get to 1000 ft its power back to just over 2300 the lean to get to 2350rpm which according to the Lycoming manual is 65% economy cruise. At 2 quid a litre for avgas you gotta make every last drop count.
I read in a lycoming 0-360 related article that at approximately 5000 msl it was just as efficient to redline the engine (2700 rpm)as it is only producing 65% power at full RPM at that altitude, does this sound right? or am i misunderstanding something?