there is a lot of talk going on right now among new volt owners re the charge capacity of the volt. The problem is we, as new owners, do not know what to expect under varying conditions. (I am talking about the displayed 'miles' capacity after a full charge.) GM states a range of 25-50 miles. I get around 30... how do I know if 30 is expected/right for my outside temperature and whatever other major factors affect it? GM must have some data that would allow us to better gauge or understand this... can you provide? For example, if 30 miles capacity is good for 40F and 40 is good for 70F, then we'd like to know that and can set our expectations accordingly.