Gas milage?
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Freshman User
Joined: May 2006
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Gas milage?
I have a 1990 F250 4wd with the automatic with the overdrive and the 5.8 engine. What kind of gas milage should I expect on thwe highway if it has a decent tune up? Thinking of making it my daily driver for work.
Senior User
Joined: Jan 2008
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From: New Hampshire
In this case, its your tires that are taking away on what you could be getting.
Fleet Owner
Joined: Oct 2005
Posts: 20,785
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From: Kentucky
The tires are factory height, but a little wider. But I also agree the factory 3.55 gearing is not helping at all with my combination. It looks good on paper but in practice it is not optimal.
Freshman User
Joined: Feb 2010
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I have a 97 F250HD 4x4, 5.8L with an auto and 4.10 gears, it's all stock except for a 3in exhaust from the manifolds and I get about 12mpgs. That is driving at 65mph and I am a fanatic about regular maintenance so it's tuned up pretty well.
