YES..........Sta-Bil is a MUSTI live in northern NH and store 2 cars in an unheated garage and another in a garage that's unheated but under the house so temps aren't as low. I've not had any problems with condensation or damage from same. Nov. and April can be pretty damp, but the winter months are so cold that humidity isn't much of a problem. Mice are another issue altogether, and there's a lot of folklore about the best prevention measures...traps, dryer sheets, mothballs, peppermint oil, pepper spray around the garage door where they could get in. I've used them all. A good cover, extra air in the tires, check anti-freeze concentration, Sta-bil, Battery Tender, no salt on it when you put the car away and wait until it's all off the roads before you take it out, and you'll likely be just fine.