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Old 04-17-2008, 09:52 PM   #2 (permalink)
Lazarus
ECO-Evolution
 
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Join Date: Nov 2007
Location: Central Texas
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Iron Horse (retired) - '97 Iron horse Intrepid

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Are emissions and CAFE the same thing? There were several changes during those time frame.

Also how do we know that without emissions that the MPG would not also increase. We have no data because the it's illegal to do so but there have been folks that pull emission stuff to get better mileage or run leaner getting higher NOX levels that would not meet the EPA standards but get better FE.
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