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Message: <blockquote data-quote="dennishoddy" data-source="post: 3792174" data-attributes="member: 5412">I have the F-250. Driving to OKC and back yesterday without resetting the mileage, I got 12.8.Fords have a progressive method of determining mileage.When first resetting it, every quarter mile it changes.As one drives, the time between notification of changes increases to the point that it only changes ever 50 miles or so.He needs to do a manual calculation for the real mileage. Top off the tank, drive, top off the tank and calculate the miles driven vs the gallons used. That is the most accurate method.When your buddy takes his next trip, have him zero the mileage thing and see how it reads vs the actual mileage with the manual method.Some of the car manufacturers have been accused in the past of cheating on the mileage calculations and making the electronics reflect higher than average mileage.Why sacrifice a multi billion dollar business over some additional profits when your making tons of money already?Have your buddy do a manual check. It will be close I'm betting to the electronic.</blockquote>