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Old January 13th, 2008, 09:08 PM   #11
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Join Date: 11-05-05
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I don't know how accurate those digital overhead calc. are. But I took a trip with Ironman in his old '04.5 Cummin dually w/4.10 gears. I looked at the over head a couple times and it said 22-23mpg. His truck had a some kinda chip, airfiler and exhaust if I remember correctly.

I'm sure that over stated what he was getting...but it must of been high teens at least.
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