2011 Ford Mustang V6 EPA certification just finished and, though Ford predicted 30MPG from their 305HP 3.7-liter V6, they actually got 31. According to Ford, it's the first 300HP+ car ever to return over 30MPG. Having cake, eating it too.
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Erm...according to the googles THIS is the first 300hp 30mpg vehicle.
I think I like the Volvo better anyway.