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

    +1  Views: 1970 Answers: 3 Posted: 12 years ago
    Tags: cars trucks suvs

    3 Answers

    Advanced technology gained from F1 and Nascar experimentation.

    That little black box under the hood which maintains the best fuel efficiency  for the performance driven.

    They're more aerodynamic and lighter in general.



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