Re: Winter preparation...
I understand everything on your list except for the draining the oil part. I understand your reasoning however I don't think it's good to not having anything in their period. Metals that are subject to oils at all times are resistant to rust but when they become dry they can surface rust. Get some warm-cold-warm-cold days throughout the winter and there you have moisture to ad to the rustation process. Personally, i'd leave it in and then come spring just before you're gonna drive it, then drain it and change maybe even run a can of Motor-flush through it at the same time.
My .02 worth.
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