Not sure what you mean about the flame suit, and that link doesnt link to anything for me. And no, gas mileage is not a huge concern for me. I don't commute, and many of the trips I take are 5 minutes down the road. And as far as wheeling goes, the H2 is beastly off-road. Obviously the length and width have to be taken into consideration, but special considerations have to be taken with any car, Xterra or H2 or Jeep.