That would only be true if the elevation of point A and point B were the same.
It's FLORIDA! The elevations are all the same, the whole damn state is flat. The highest elevation is 348 at britton hill (that is really really.... really high for florida) the lowest is .0000000000000001 on the beach. Back to the thread though, that is low for mpg on any limo, unless there is a lot of idling.
I just took my 120" to Port Everglades in Ft. Lauderdale it was about a 200 mile trip. I burned 12 gallons getting there with passengers. I filled up and came home. I burned 8 gallons getting back. I ran the same speed both ways. I can only attribute the extra consumption to the extra weight and the rear power on.
Extra weight would make a big difference. Wind does play a big factor, different fuel blends, and idle time will also play a part.
And to think, this was a thread that died in 2009. *sigh*
I really do not understand why that is a big deal to some of you - you do realize that the more people post on here the stronger the forum is in many ways? Forums exist to discuss things, not to sit idle because some think all topics have been exhausted. I'm not trying to beat you up here, Tim, I have just noticed this response by a lot of people and, quite honestly, do not understand the logic.