Hm, 5 cents per mile is probably about right for me too, if I also include clothing and lighting. I've spent about $1200 and am close to 23000 miles on the bike.

Last time I calculated it, it was about 10 cents per mile, so it's going down and hopefully it'll continue to do so.

As I said earlier in the thread though, cycling actually costs me money because of the amount of time I spend doing it versus driving, which if I were working overtime instead (which I definitely would be doing), vastly more than offsets the cost of running the car.