I had a Vauxhall Frontera (colonies: read Isuzu Rodeo/Holden Frontera as applicable) which would do 12 miles to the gallon rock solid - around town, onthe motorway, empty or fully loaded (and I mean fully loaded). Its only virtue was an incredible ability to carry a HUGE amount of junk/equipment/drunks over very bad ground (e.g. your typical folk festival) without getting stuck.

Having an ever-expanding family I now drive a Hyundai Trajet (eh?) which is a great comedy turn for those dull and quiet moments.