Genghis
Can't understand your comment re: renting on a dry rate will mean flying ecominically and prolong engine life.
Call me a young fool (against your background / experience) but I always thought this was the complete opposite. Any fuel leaning, be it to best economy or even too lean to save every penny will result in increased engine temperature and increased wear (poorer lubrication at high temps.)
This is why when I was training (in Florida) we where told never to lean the mixture at any level, to keep the temperature and engine wear down.
Surely if your renting wet you aint gonna worry about using a couple more litres and keeping the cht down...
