Tin Woodman
The oil needed by the Tin Woodman had a political dimension at the time because Rockefeller's Standard Oil Company stood accused of being a monopoly (and in fact was later found guilty by the Supreme Court). In the 1902 stage adaptation, which is full of topical references that do not appear either in the novel or in any of the film adaptations (unless they are satirical), the Tin Woodman wonders what he would do if he ran out of oil. "You wouldn't be as badly off as John D. Rockefeller," the Scarecrow responds, "He'd lose six thousand dollars a minute if that happened."