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Old 03-07-2011, 09:18 AM
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bad fuel mileage

I have never had a diesel before and bought a 2000 F350 CC with 8' royal truck bed on it and I just went through my first tank of fuel and calculated 12 3/4 mpg. I think I should get better then that it was all in town driving though. What should I look at first.

Fred
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Old 03-07-2011, 10:22 AM
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SRW or DRW? those extra tires can add up, and gearing does too, that sounds normal for in town.
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Old 03-07-2011, 11:02 AM
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SRW. I don't know the gearing in it. I just figured I would get better then that
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Old 03-07-2011, 12:04 PM
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stock intake and exhaust? what are your highway speeds? is there a load in your bed? stock size tires?
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Old 03-07-2011, 12:22 PM
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They look to be stock manifolds. It was all pretty much in town no highway. Maybe 500 lbs in the bed. I would guess stock size tires lt265/75r16, they are wider than a dually tire but narrower then a 4 x 4 tire.
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Old 03-07-2011, 12:27 PM
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if its city then thats probably normal for a 350. your best bet is straight pipe, DIY 6637 intake and granny foot. after that a chip if you choose to spend the $$ is it a dually or a SRW?
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Old 03-07-2011, 02:11 PM
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Im in the same boat - just bought a 2000 and getting 12.4mpg. so far I found a bad icp sensor a bad ebp sensor, my fuel filter was clogged, I put a dp 60 econo chip on it. havnt recalculated my mileage yet but it looks like its going to be somewhere in the neighborhood of 14 to 15. getting better but still not enough.
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Old 03-07-2011, 07:33 PM
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You're getting 13 MPG in a 8000LB truck. Be happy. My boss's son has a Dodge Hemi 1500 that gets 13.7 on the highway. Don't even ask what the in town is. Remember, you're running winter fuel too. That'll zap a few MPG.
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Old 03-08-2011, 06:22 AM
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yeah, my mpg is steadily climbing back into the 15-17 mpg range in combined driving now that the summer blend fuel is coming back

I hit as low as 11.1 mpg this winter with that ****ty winter blend stuff
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