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10 mpg. help!

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Old July 3rd, 2012, 12:54 PM
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Default 10 mpg. help!
I’m only getting about 10 mpg on my 2008 DL 3500 LTZ . Runs like a champ and does the work but the cost of fuel is out of control. What do I need to do to fix this? My friends have Fords and Dogs. Thy say thy get almost double that. Help!
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Old July 3rd, 2012, 1:25 PM
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whats the differential ratio?
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Old July 3rd, 2012, 2:22 PM
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I don't know. I'm just own it and fuel it.
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Old July 3rd, 2012, 2:23 PM
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why would I know that?
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Old July 3rd, 2012, 2:34 PM
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Originally Posted by kalibash1
why would I know that?
If it is geared low you will always have a gas hog.
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Old July 3rd, 2012, 2:36 PM
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I havent changed anything. its the way it came new
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Old July 3rd, 2012, 2:49 PM
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I imagine a duramax with 4:10 gears. Any maintenance been done to it?
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Old July 3rd, 2012, 3:48 PM
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no. never had any problems
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Old July 3rd, 2012, 3:49 PM
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6 speed allison
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Old July 3rd, 2012, 3:51 PM
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should I chip it. if so what chip should i use
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