Don't waste too much time planning this stuff out because you might not get the car you reserved. I've flown 8 times in the past year for my job to give/receive training. Each time the corporate travel office reserves the cheapest car at the cheapest rate they can find. Not once have I gotten the car that was reserved for me and was "upgraded" to a larger car. I've been upgraded to:
Ford Explorer
Jeep Liberty (2X)
Ford Taurus
Lincoln Town Car
Ford Crown Vic (2X)
Lincoln Navigator
I don't pay the bills for these trips so I don't really care, but if I was counting on a small car to save money on gas I'd be pissed big time.
