It's been terribly cold and unusually snowy/icy this year. We've not been much above 40 F in a month or so. At least STL didn't get the nasty snow my Tulsa, OK and SW MO friends got.
That said, fuel economy has been slipping. I KNOW I'm killing my gas mileage on my 5-10 minute commute to school. Not enough time to warm up. Too cold to bicycle. I do, however, have the opportunity to increase FE when I visit my fiance on the other side of the city, not that that's the main reason to drive over there.
I think I need to put the lower grill block back on!