Just to needlessly add another opinion to this thread, change the oil now before you put it up. Used oil contains combustion byproducts like unburned fuel, acids, and other junk that you don't want sitting in your engine over the winter. Honestly modern oils are pretty good at "containing" the contaminates, so if you have changed it even recently it should be fine. Modern oils are formulated to suspend the junk and fight the acids with their ingredients, calcium in particular is added to fight the acids, IIRC.
However I do disagree with the post about modern fuel being good at sitting. Modern fuel is shite, and loses a lot of it's volatility in about 2 weeks. the main thing you can do to keep it fresher, is keep the tank full, so it can't breathe out the volatility, or drain the tank and keep it empty (which is harder than just keeping it full). However I don't think that it is necessary to completely drain an injected system like ours, as the system isn't open to the atmosphere like typical carbs are. In carbs what happens is the fuel evaporates, and then the floats let in additional fuel, which keeps evaporating. If it just evaporated it wouldn't be so bad, but it's the junk that doesn't evaporate that causes the plugged passages in the carbs. Anything with a carb that I own, gets drained and refilled again when the time comes for just this reason, and I haven't had any fuel related problems with any of my OPE's carbs.
:falldown: