Chevy Duramax Fuel mileage

houstown wrote:
Have a 3500 DRW Duramax that tows a 34 ft. fifth wheel weighing 11000 lbs. Best I have ever done was 9.5 mpg towing and around 18 not towing.

We have an 05 3500 2wd crew cab and tow a 35 ft alpenlite for a total weight of 22920 lbs and never have been below 10 mpg using math.
chevman

We have a 2008 2500HD Duramax CrewCab long bed towing an 8000 lb TT. I carefully measured fuel consumption on a round trip from Baltimore to DisneyWorld down route 95 (very flat, about 2/3 of the trip at 65 mph, the rest at 55-60 mph). We got almost exactly 11.0 mpg average over the entire trip (close to 1900 miles)

About the same as mine. I get18-19 empty hwy.

Do you just hate these fuel-guzzling DPF trucks?!!

My father in law has the 2003 Duramax/Allison set up. 2 wheel drive, crewcab. He has a light foot at 73 years old and tells me that he gets around 12-13mpg with a 8700 lb (dry weight) 5th wheel.

Have a 3500 DRW Duramax that tows a 34 ft. fifth wheel weighing 11000 lbs. Best I have ever done was 9.5 mpg towing and around 18 not towing.

We have a 2008 2500HD Duramax CrewCab long bed towing an 8000 lb TT. I carefully measured fuel consumption on a round trip from Baltimore to DisneyWorld down route 95 (very flat, about 2/3 of the trip at 65 mph, the rest at 55-60 mph). We got almost exactly 11.0 mpg average over the entire trip (close to 1900 miles)

P.S. We really love the truck; great fun towing with it!

John

mwool wrote:

goin2themountains wrote:
over 40k miles, 14.5 empty, 11.8 with the 5er in my sig. I pull serious hills.

WOW I get almost exactly same as you do. Exception is around DFW, what ever the additive is they put in the fuel cuts us down about 2 MPG.

In Texas, it's the bio-blend diesel. I thought it was all of Texas not just the big cities. On my trip to Austin this year, I knew right away it was bio-blend. Lost 2 mpg towing and 1 mpg without the 5ver. Everywhere we went in Texas was minimum of 5 to maximum of 20 percent blended.

Dodge = Aisin
GM = Allison

Look and sound alike but dont' confuse the two...

last 2 winters one friend tells he has an Allison trannie in his Ram 3500 but of course we know he does not.
chevman

Ford owns Cummins, don't you know? Chris

On my USA trip this summer wityh my 27.5 5th wheel and truck,I was at a gas station in Sacramento and this guy on the opposite gas pump as me laughed at me as I was filling my Silverado 496 big block 8.1l with gas. He said I must be crazy to use a gas engine.

As he has a 09 dodge cummins and he said that now dodge offers the Allison transmission in their trucks he took his in and had it done to. He also has a 33ft toy hauler fully loaded he gets 22 mpg towing, people like this are just pathetic, they trying to compensate for something else? Felt like slapping him but was nice and let it go.

If you happen to be on this site, all thought was how much of a clown you were when I left, not everybody will believe your BS.