This crossword puzzle ad comes from 2007 and features the increased fuel efficiency of the second-generation MINI Cooper.

THE MINI ONE-GALLON CHALLENGE.

JUST HOW LONG CAN A GALLON OF GAS LAST? Depends. Seconds if you’re in a rocket ship. Ages if you’re in a MINI, which is the next best thing. So, to simulate this miles-per-gallon miracle, and show just how long it takes to use a gallon of gas when driving a MINI, we commissioned Fred Piscop, editor of the Washington Post Sunday Magazine crossword, to create this puzzle. Unless you’re a word whiz, it should take you about 40 minutes or longer to complete. Good luck. And may your lexicon be lengthy.

Download The MINI One-Gallon Challenge.