Fuel chamber
From Futurepedia, the Back to the Future Wiki
The fuel chamber of the DeLorean time machine held the plutonium and later garbage that powered the flux capacitor. It was accessible via a circular port on the rear of the car.
The fuel chamber is not to be confused with the fuel tank.
[edit] Behind the scenes
The base of the DeLorean's fuel chamber was constructed from a hubcap of a Dodge Polara.
