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Old 02-25-2004, 12:46 PM   #1
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Solo mileage of Dura-max engine

Anyone have good figures? I need to know what your solo mileage on an extended cab K-2500 Chevrolet/GMC equipped Duramax. We are thinking of clearing out the garage and using one vehicle for everything: towing/daily driver/grocery-getter/sunday cruiser.
I know towing will be a breeze, I really need non-towing city/highway figures. The manufacturer doesn't list mileage figures. Thanks in advance.
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Old 02-25-2004, 12:51 PM   #2
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2018 Interstate Grand Tour Ext
Austin (Hays County) , Texas
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Good mileage

I get 14-15 towing my Classic 25.

Solo, I get 19-20 around town. Typical use is 6 miles of hilly country road, some city driving, and another 6 miles if hilly country road.

Solo, on the interstate, I have not measured, but the fuel gage sure does go down slow. Must be in the 20s.

I also will probably sell my Buick and use the truck as my lone ride.
John W. Irwin
2018 Interstate GT, "Sabre-Dog V"
WBCCI #9632
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Old 02-25-2004, 12:53 PM   #3
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1994 30' Excella
New Smyrna Beach , Florida
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I can't help you on the chevy but as a starting point my 3/4 ton extended cab long bed 98.5 Dodge Cummins diesel with automatic gets between 22-23 solo and 16 pulling a 25' Safari.

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Old 02-25-2004, 02:12 PM   #4
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1999 34' Excella
Joshua , Texas
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Solo to and from work in our '02 C-C dually D/A, we get 19-20. When coupled to our '99-34', we get 17-18 using 1800-1900 RPM.
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Old 02-25-2004, 03:07 PM   #5
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Mileage solo

The model truck seems to make a significant difference. I've been watching similar threads for some time now. Before I switched to a winter blend I was getting about 17.5 to 18 mpg on the highway. Using a winter blended fuel my mileage has dropped about 1 mpg. One thing worth noting is that I live in Maine where a lot of my driving is up and down hills. I haven't turned 10,000 miles yet - and I understand that the Duramax just keeps getting better! Note that my rig is a crew-cab, 4X4, long-bed dually. These mpg figures are long-term, using the "personal" and "business" functions on the computer. I've also manually checked the results - not wanting to totally rely on the on-board computer. The results were identical. I haven't had the opportunity to do any extensive towing yet, thanks to Old Man Winter! My results have been consistently lower than what others have reported - but I'm not complaining. This is the smoothest-running vehicle I've ever owned - in spite of it being a diesel. I probably need to push it a bit just to loosen things up!

2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074
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Old 02-25-2004, 03:21 PM   #6
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dura-max mileage

I get about 16mph empty, but I only have 1800 miles on my 2004 crew cab dualie 4x4, much better than my Hummer. I sold the H2,in order to have a means of carrying my Harley on trips. The hummer was fun for the 18,000 miles I put on it in one year, but I'm a true dualie fan. is offline   Reply With Quote
Old 02-25-2004, 06:08 PM   #7
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1977 Argosy Minuet 6.0 Metre
1964 26' Overlander
1977 25' Tradewind
Eastern , Washington
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I have a 03, 2500hd extended cab Duramax with the Allison,
I get about 18 average around town and towing about 14 to 15mpg pulling a 7800# equipment trailer. Pulling my 6meter Minuet at 2700# I get about 18 average. I only have 10k miles and the milage keeps getting better.
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Old 02-25-2004, 06:42 PM   #8
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1975 Argosy 26
Villa Ridge , Missouri
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My dad had an '01 extended cab shortbed 4x4 LT with the Duramax that he used for delivering travel trailers, and he averaged about 14 pulling and between 21-23 empty on the highway. He did very little in-town driving but figured he got around 15 in town.

He had an accident while towing and gave up the truck. He went back to a gas and really, really misses the Duramax. We're Ford people, and even we thought it was a great truck!
Both Alex, my Argosy, and I are kids from Versailles, Ohio!
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