This thread is well overdue for an update. In mention of cars, I've somewhat recently replaced the 97 Sunfire with a 99 Metro that basically double the gas mileage of my commuting. I don't have a full month yet of fuel usage, but next month I can do that analysis.
This month was comparably quite cold though. Actually, it was the coldest November since I moved into the house. We averaged 26.9 HDD/day. Last year was horribly cold and we only averaged 24.6 HDD/day. I hope we're not in for an even colder winter this year. Time will tell.
Of course, this all means I used more energy than last year.