Just filled up the tank!
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Joined: Apr 2008
Posts: 14
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From: Mesa, Arizona
I too am getting over 18.5MPG on my 07 5.9 QC dually. I still cant believe it. And yes this is hand calc. this is a great improvment over my 2005 Superduty that I just traded in. What a good move switching to the cummins for sure
Advocate of getting the ban button used on him...
Joined: Aug 2005
Posts: 5,082
Likes: 9
From: Live Oak Texas
If you see a blue Mega Cab it's me!! I have the Quad mileage module and keep it about 65mph and so far have still been getting 20.5 -21.5 mpg. hand calculated.
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Registered User
Joined: Nov 2007
Posts: 97
Likes: 0
From: Venice, Florida
I moved from Texas a year and half ago and if your getting 20MPG down there you're doing good.. I mean they only have three seasons... Winter, Summer and Super Summer.. 
You've been running your AC for two months already 
You've been running your AC for two months already
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