There is no better vehicle in a zombie apocalypse!
M923A2 weighs in at about 22,000 pounds and is powered by an 8.3-liter, six-cylinder turbocharged Cummins diesel motor that currently generates about 375 horsepower and 1,000 pound-feet of torque. It still returns 14 to 16 miles per gallon in its present tune. To get the power to all four corners, the motor is hooked to an Alison five-speed automatic transmission and a two-speed transfer case.
This turbocharged, 504 cubic-inch Cummins 6CTA8.3 motor has been substantially warmed over to provide significantly more power than it did in its stock configuration, yet it still yields fuel economy numbers in the teens according to Dicarlo. Not bad for a truck weighing 11 tons.