Pentagon is the world biggest consumer of Oil in the World
Pentagon Oil consuming machines are:
As of September 30, 2005 the US Air Force had 5,986 aircraft in service.
At the beginning of 2006 the US Navy had 285 combat and support ships, and around 4,000 operational aircraft (planes and helicopters).
At the end of 2005, the US Army had a combat vehicle fleet of approximately 28,000 armored vehicles (tracked vehicles such as Abrams tanks and Bradley Fighting Vehicles). Besides those the Army and the Marine corps have tactical wheeled vehicles such as 140,000 High-Mobility Multipurpose Wheeled Vehicles. The US Army has also over 4,000 combat helicopters and several hundred fixed wing aircraft.
Add all those also 187,493 fleet vehicles (passenger cars, busses, light trucks etc) the US Department of Defense (DOD) uses.