This issue has always been close to my heart, when you do 500-600 hours per season, it makes a HUGE difference in your budget what your economy is and what the price of gas is. Gas may be cheap now, but it never is in the summer.
RJ and I created a Fuel Cost Calculator that can be embedded for an article I just wrote on the various surf systems. Try it out.
You can read the article
HERE, its very long, too much to post. Or maybe even read. ;-)