Post subject: Horible gas mileage on 2004 4.2 F-150
Posted: Tue Jan 30, 2007 12:26 am
Joined: Mon Jan 29, 2007 11:53 pm Posts: 1
When I first bought this truck it was getting about 15.5 MPG. I put larger wheels and tires on it, no other mods, and mileage droped. So I decided to get the 1815 flashpaq.. thinking it would boost my gas mileage after reprograming with correct tire size... nope... MPG droped even more.. I am currently using supreme gas in the truck... just hoping someone can tell my if there is a problem with my truck, or if i am doing something wrong...
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