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post #1 of 2 (permalink) Old 11-24-07, 12:16 PM Thread Starter
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Fuel milage

Hello.. I have a 2006 F250 diesel, with about 27,000 miles on it. I put an 4 in lift and bigger tires on it last year. I was getting about 315 miles to a tank, Now al of sudden I've been only getting about 200 miles.. I run it the same as I was before.. No light has come as of yet.. I've check the air filter and seems to be good. Any suggestion.....

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post #2 of 2 (permalink) Old 11-26-07, 06:28 AM
wwb
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Re: Fuel milage

Your fuel consumption is not as bad as you think.....

If you put on bigger tires, they'll have a larger rolling radius; if you don't reprogram the computer to compensate, your odometer and speedometer will both register low, in direct proportion to the change in rolling radius.

The larger tires will have more rolling resistance than the smaller ones, so there will be some increase in fuel consumption. The lift won't affect your city mileage, but it will hurt you on the highway; somewhere between 1/2 and 1 mpg.
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