Doug Kanter wrote:

I said nothing about reducing engine size. I'm talking about the 100-200 lbs
of extra parts that a 4WD vehicle needs to turn, even when 4WD is not
engaged. Take a Ford Explorer, for instance. ***BASICALLY*** the same V-8 as
a Crown Victoria. The sedan gets (in real world terms) about 25% better gas
mileage.

fleets like that generally want to stick with one type of vehicle, so
they can keep a smaller supply of parts like tires, filters, etc. plus,
car tires are cheaper than SUV tires.