I live in eastern Pa. I usually try to drive the car once a week in the winter as long as the roads are dry. I never remove the battery or use dry gas or anything. The carb has never given me any trouble either. Early Saturday mornings work for me. Sometimes a couple weeks go by but does not ever effect anything so far with the Z/28. Not sure if aviation gas is good for the car or not. My garage is heated so that helps.