Thomas Borchert wrote in message ...
Btiz,

Some will argue it is not needed to lean below 3000MSL..


Uh, only those clinging to one of the more stupid OWTs (Old Wive's
Tale).

While it's true that leaning by altitude is somewhat of an OWT, it's
important to remember that, like most OWTs, it has some basis in fact.
Specifically, you should not be leaning if your engine in making 75%
power or better. Of course, in normally aspirated light singles, the
percentage of power available is greater at lower altitudes.

John Galban=====N4BQ (PA28-180)