AP:

Getting President Bush from here to there consumes an enormous amount of fuel, whether he’s aboard Air Force One, riding in a helicopter or on the ground in a heavily armored limousine. The bill gets steeper every day as the White House is rocked by the same energy prices as regular drivers. Taxpayers still foot the bill.
Almost every vehicle Bush uses is custom-made to add security and communications capabilities, and the heavier weight of these guzzlers further drives up gas and jet fuel costs.