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Old January 29th, 2010, 07:33 PM   #12
mprmn08
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Join Date: 01-08-09
Location: grandville, mi
Posts: 252
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17-1900 for best mpgs/dd and about 2000-2200 for towing. i dont care what anyone says over 2000 will not get you best mpgs in a cummins
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