You guys go right on ahead and do that. I'll keep using my Giant Terex truck like the one in the video here.
http://www.youtube.com/watch?v=ZalIPvPlDJEMine runs on diesel, but the diesel powers an electric drive, so it's my kind of hybrid.
Used to use surplus Panzer tanks, but just can't get parts for them any more and all my scrap tanks have been picked clean.
Got a lot of good use out of Greyhound surplus busses modified to be all wheel drive half track and double diesel, but preferred the one that I made to run on bunker oil. Lotsa torque on that baby. Sold the engine to a guy who wanted to put it in a ship.
Tried steam, but it was too temperamental and not loud or smoky enough, except one particularly good mountain engine that I used to power by stoking it with shredded car tires.
Truth be told, I've hit the wall with my projects and need to go green for the ice breaker I'm building. Conventional power won't cut it. Gotta use nuclear.