Maybe $100 a month; I'm not really sure. I only fill up the truck every couple of months, but it seems like I'm always putting $30 worth in the Cadillac. I don't drive much except to goto work and to church, and I'm starting to ride my bicycle more for errands. The weather is just starting to get nice; I'm gonna start riding it to work a couple of time a week. I did that last year and it worked out pretty well, just wear a dirty shirt and change into a clean one when I get there.
Wife drives a Ford Focus that averages over 30 mph and gets 41 on the highway. I don't know what she spends on gas, i just make the car payments.