1999 - 2016 Super Duty 1999 to 2016 Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines

mileage

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Apr 4, 2005 | 02:04 PM

bruce54

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Joined: Apr 2005

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mileage

I own a 99 F250 super duty with a 5.4 L and 3.73 rear end 4x4. Any way of increasing gas mileage? Have put K&N air filter in, otherwise it is stock. Is there a replacement chip that would make it worthwhile?

Apr 4, 2005 | 02:35 PM

Kadukoboy

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Joined: Mar 2004

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smaller lighter tires

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