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What is the best fuel Economy mode

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blake_glenn
 Post subject: What is the best fuel Economy mode
 Post Posted: Tue Dec 23, 2008 7:55 pm 
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Posts: 1
I just bought the 1808 model for my 08 F350 6.4 and I am wondering which program will give me the best fuel mileage running empty?
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jim119
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 Post Posted: Thu Dec 25, 2008 12:06 pm 
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I would say the XMS or the Performance mode...depends on which octane you prefer to run.
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lil.rambo
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 Post Posted: Wed Mar 18, 2009 7:19 pm 
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what is XMS
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jim119
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 Post Posted: Thu Mar 19, 2009 12:35 pm 
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lil.rambo wrote:
what is XMS
It's a downloadable tune that uses 87 octane.
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Ironhide1
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 Post Posted: Tue Mar 24, 2009 10:16 pm 
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Joined: Fri Nov 28, 2008 11:09 am
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Location: Regina, Sk. Canada
jim119 wrote:
lil.rambo wrote:
what is XMS
It's a downloadable tune that uses 87 octane.


His superduty is a diesel.

I have always run performance. Stock absolutley *h for performance of any kind. It is like driving a semi with a vw engine in it.

temperature makes such a huge difference in my mileage that changing the programming wouldn't likely give me a noticeable differance.
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