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Old 09-03-2005, 04:02 PM
drmiller100 drmiller100 is offline
LawnSite Senior Member
Join Date: Jul 2004
Location: McCall Idaho
Posts: 564
99 f250 4x4 crewcab smokewagon. average 12-18 mpg. 12 is with 15k gooseneck, 18 is empty. 14-15 mpg towing skidsteer, mowers, or other light stuff.

subtract 2 mpg without superchips in race mode. it gets better mileage the more you crank up the programmer.
subtract 2 mpg for winter fuel.
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