Who to believe . . . about leaning?

Is this really definitive:

Mike-Bush-Red-BoxRed-Fin.pdf

What Lycoming says:

I have been experimenting with the BMP.  I hope I don't need an overhaul sooner than TBO!  (smile)

FM 15020KT

When you can't go flying because of the weather, you study the weather.  But how would you decipher the phrase in a Center Weather Advisory:

• AREA EMBD OF TS AND SHRA WITH MOD-HVY PCPN MOV FM 15020KT

I still cannot find the definitive resource but an FSS 1800wxbrief briefer and I discussed it at length today.  I would love to see it in writing!

Flying to 09J . . .

On a trip from KSRQ to 09J, the most expensive vehicle, per mile, was not the plane!