Thread: Is 12 mpg attainable
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Old 09-29-2014, 09:49 AM   #4
05duramaxhd
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Join Date: Jan 2013
Location: Newalla, OK
Posts: 600
Re: Is 12 mpg attainable
i have a 86 all original with 63K miles 305/700r4/2.73 factory gear 2wd. I just did a 220 mile trip and she got 19.311 MPG's I was stoked. had cruise set at 58 MPH
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