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  #11  
Old 01-07-2011, 10:51 PM
Regen Regen is offline
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I have a 2004.5 GMC Duramax 4x4 and I get about 28 mpg whether towing or empty. The previous owner did something to the truck, but I don't know what it was.
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  #12  
Old 01-07-2011, 11:09 PM
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Is that from your overhead?
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  #13  
Old 01-07-2011, 11:14 PM
Regen Regen is offline
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I don't have an overhead. All hand calculated. When going from Weston, Colorado to Goldthewaite, Texas, I get good mileage, going there an coming back. But I generally drive in town and get about 21 MPG.
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  #14  
Old 01-07-2011, 11:32 PM
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Wow! I wish I got that kind of fuel mileage. That is really good!
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  #15  
Old 01-07-2011, 11:46 PM
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Wow... and I thought my 20mpg highway was pretty good
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  #16  
Old 01-13-2011, 03:51 PM
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DieselDrew24 DieselDrew24 is offline
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My uncle is running a 08 DirtyMax with EGR deletes and fuel chip and only gets 20........he hadan 05 and only got 18 with that.......did you pass math in school Regen? hahaha
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  #17  
Old 01-13-2011, 10:20 PM
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Quote:
Originally Posted by NikkiMn View Post
Wow... and I thought my 20mpg highway was pretty good
Nikki don't sweat it...

20 MPG is very honorable... Just marking the 20's is a good thing... As for reaching a high mark above that takes serious work... Like you seen my graph I can touch the 20 MPG mark frequently but beyond that is tough to hold...
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  #18  
Old 01-19-2011, 10:57 PM
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My best hand calcuated was 22mpg. Truck was bone stock then, automatic trans. 17 miles at 70-75 and about 10-15 miles at 60mph driving to work. Range was about 550 miles if I remember correctly. No idea what im getting now with the upgrades and the pure #1 fuel im running now. (Truck gelled up on me the other week and I dont want to deal with that ever again.)

I have gotten about 16 and some change towing my 18 foot trailer with a Jeep XJ on the interstate for about 300 miles which I thought was decent for a bone stock CTD.
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  #19  
Old 01-19-2011, 10:59 PM
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Quote:
Originally Posted by Regen View Post
I have a 2004.5 GMC Duramax 4x4 and I get about 28 mpg whether towing or empty. The previous owner did something to the truck, but I don't know what it was.
Have a buddy that has gotten this with his Dmax. He runs water/meth with a mild tune. His was empty, coming back to MN from Montana.
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  #20  
Old 09-19-2011, 09:08 PM
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Quote:
Originally Posted by xjrev10 View Post
My best hand calcuated was 22mpg. Truck was bone stock then, automatic trans. 17 miles at 70-75 and about 10-15 miles at 60mph driving to work. Range was about 550 miles if I remember correctly. No idea what im getting now with the upgrades and the pure #1 fuel im running now. (Truck gelled up on me the other week and I dont want to deal with that ever again.)

I have gotten about 16 and some change towing my 18 foot trailer with a Jeep XJ on the interstate for about 300 miles which I thought was decent for a bone stock CTD.
Ohh the old days.

Today I get 14.8 on the overhead in the 08. I have been too lazy to hand calcuate. Gotta get a good road trip towing and get a number. I talked to a couple guys with the 6.7 trucks and they have hand calculated their mileage and the overhead was VERY accurate. That doesnt mean mine is but who knows. The best I seen on the overhead was 19, driving 200 miles back home at 55 mph.
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