Go with the bike... I rode a few dirtbikes when I was a kid but not much, then I bought an old school Honda CX500 street bike last April and started riding. I get 50+ mpg and its way nicer to be outside riding. I don't hardly drive my truck at all, mostly because I have a company car to drive now and I don't have to pay for gas at all. its $2.85 here and going up steadily.