I live in a place with fairly cold winters. I took my bike to the LBS the other day to get a little help thawing out and relubing a cold-stuck brake cable. (It had rained the day before; I really should have known better.) The mechanic told me to watch my Alfine 11 internal gear hub for sluggishness, and if I notice any, to bring the bike in to have the grease replaced with a lighter oil.
Anybody done this who can speak to the pros and cons?