I don't run errands in the evening unless I absolutely have to. When I do, I try to "chain" the errands, so I don't burn any more miles than I have to. I mention this because there are a lot of people who run errands and burn gas after work simply because they're bored.
83 round trip for me...5 days a week.
I could probably get a car pool started w/another couple I work with, but overtime is offered quite a bit & they don't like to work/volunteer for overtime.
So, it's about 415 miles/week for me!