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    4. why are cars more fuel efficient compaired to cars decades ago?
    why are cars more fuel efficient compaired to cars decades ago?

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    +1  Views: 2139 Answers: 3 Posted: 13 years ago
    Tags: cars trucks suvs
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      3 Answers

      Advanced technology gained from F1 and Nascar experimentation.

      13 years ago. Rating: 3
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        That little black box under the hood which maintains the best fuel efficiency  for the performance driven.

        13 years ago. Rating: 3
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          They're more aerodynamic and lighter in general.

          13 years ago. Rating: 1
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