WWW.fueleconomy.gov is an extremely useful and informative site.  Initially, I stumbled on it while trying to research fuel economy for various car models as I was preparing for a lengthy road trip.  I quickly discovered that I can compare several models/years side-by-side for fuel economy; additionally, I could compare passenger and cargo space among models as well. — — This website also provides valuable information about ratings, gas prices, energy efficiency, hybrid and alternative fuel vehicles, and much more.  I plan to use this site as an important tool in… read full review »