10 cars you don't want during a gas crisis

BMW packs a lot of technology into all 4,200 pounds of the M5, notably a new twin-turbo V-8 that puts out 560 hp and produces enough oomph to pass everything on the autobahn. Germans pay dearly for that rush of power: $8.50 per gallon for a car rated at 14 mpg city/22 mpg highway. Americans will pay dearly too when the M5 reaches the U.S. market later this year for an estimated $90,000.

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