Empty The Tank Meaning

(idiomatic) To make the utmost effort; to contribute to the absolute limit of one's energy and abilities.

Example: 2006 July 5, Tom Withers, "Cleveland scores nine in fifth inning," USA Today (retrieved 19 June 2011):
  â€œIt's important over the next five games to empty the tank and give all we've got.”
2008 Sep. 1, Joe LaPointe, "Martínez Shows Strength in Mets Win Over Marlins," New York Times (retrieved 19 June 2011):
  â€œYou’ve got to empty the tank,” he said. “You can see the finish line. You know what you have to do.”
2009 Dec. 30, "Bruce Springsteen Honored at Kennedy Center," Rolling Stone (retrieved 19 June 2011):
  Stewart referenced Springsteen's work ethic and heart: “He empties the tank, every time. He empties that tank for his family, he empties that tank for his art, he empties that tank for his audience and he empties that tank for his country.”