gas in one’s tank

gas in one’s tank
 n.— «“If you talk to some of the players that have had the opportunity to walk away from the game on their own, you like to walk away with what we refer to as “gas in your tank’” McCarthy said of Favre. “And like I told him already, his gas gauge is well over three-quarters (full). He’s got a lot left in his tank. He’s not your normal 37-year-old, that’s for sure.”» —“Packers rise to occasion despite no hopes for playoffs” by Jeremy Reeves in Chicago Capital Times (Madison, Wisconsin) Jan. 1, 2007. (source: Double-Tongued Dictionary)