Hydrogen Cars — The Real Energy Story July 25, 2003March 25, 2012 From Time: ‘The best overall fuel economy of 22.1 m.p.g. (for U.S.-made vehicles) was achieved in 1987-88. Aside from an occasional upward tick, that figure has inched steadily downward, to 20.4 m.p.g. last year.’ You want the big picture about an issue crucial to your children’s future? Click here.