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Old 05-18-2015, 10:35 AM   #15
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2015 25' FB Flying Cloud
2012 23' FB Flying Cloud
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Santa Rosa Beach , Florida
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Quote:
Originally Posted by cwf View Post
2012 Duramax 4x4 Crew cab 54k miles.

15-17mpg hwy no load
8.5-10.5 towing 34' triple axle. (when first towed, we consistently had 12-15Mpg...so truck has a problem, I think)
You may have a truck issue. We have a 2011 3500 Duramax crew long bed with 81,000 miles on it.. We tow a 25FB (7400#) and carry a 3,200# truck camper in the bed. We consistently get 11.5 mpg towing and hauling over 10,000#.

Brian
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