I have an extra large solid wood garage door on a Chamberlain 1/2 hp
door opener with an old bicycle chain-type drive. The door has always
struggled a bit when opening. Now that winter is coming to Minnesota,
I'm wondering what's best to apply to the the guide wheels on each
side of the door to keep it operating smoothly during the cold months?
Actually, I've never put any kind of lubrication on the tracks on either
side, so I'm looking for some sound advice.

Thanks!
Scott