In the classic mockumentary of rock excess . This is Spinal Tap, there's a scene where lead guitarist Nigel Tufnel is showing off his guitars. He goes to this Marshall amplifier and points up that it goes to 11. "It's one louder, isn't ? You go 10 on your guitar - but where do you go from there? Nowhere. What we do is we need that extra push over the cliff, we go to 11," explains Nigel.
Same goes with the Ford Focus TDCi turbo diesel hatchback. If you ever need that extra push (not over the cliff, mind, for it would be a total waste of car), its gearbox goes all the way to six. Not that you'd feel cheated in the lower numbers- you'd have to be very greedy for speed or in a mad dash to a toilet to want more out of the sixth gear in normal driving conditions. - Allan P. Hernandez