What share of your income do you spend on fuel?

[Vkw10]

I notice gas prices when they're in the news and when I take multi-state road trips. Driving from TX to SC and back over the holidays, I watched gas prices increase by almost 50 cents a gallon going east, then decline going west. I drive a sedan and live within five miles of work, so I typically spend $20 - $30 for a tank of gas a couple of times a month.