That must of been all city driving. 210mi. of city driving in two days is quite a bit.
also if the car is warming up for 10 minutes at a time it tends to eat up gas, My worst this winter is around 17mpg strictly to and from work, never above 35mph, also let car warm up a good 5 minutes every time.
I was getting a consistent 20mpg while being on the boost pedal most of the time and city. Lately it'* been 16ish and I'm pretty sure it'* the winter fuel mixes really kicking in hard. Plus...with the current costs..I would think they are thinning and adding whatever they can to stretch it.