Hummer Limo? Really?

The development team from Yakuza 4 actually drove one of these as a bit of fancy advertisement.

http://kotaku.com/5496129/the-yakuza-4-hummer-limousine-pulls-up

What is the gas mileage for a Hummer Limo?

"Here are some reports on the H2's mileage: Motortrend gives it 12mpg; Car and Driver, 10mpg; About.com, 8.6mpg; Edmunds, 9.2mpg; and Four Wheeler, 10.8mpg. Let's just say nobody's riding in these limousines to cut back on greenhouse gases."

http://www.articlesbase.com/travel-articles/stretch-hummer-limos-1154176.html