should be 3.73's check your glove box sticker on the door.....

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got 589 miles on this last tank 32.3 gal on fill up. about 18 1/4 per gal this is after i installed H&S DPF TURBO BACK AND XRT was getting only 12 towing or normal driving. going to do the new down loads this weekend see how much more fun i can have.....

 

2009 new 2500 4x4 3.73 6.7 automatic with 175 miles on it took a 400 mile trip got 15.3 running 70 -80 mph I am very happy for now.

 

I've got about 6500 miles on my 08 2500hd with 3.73's and the auto, on the highway (30 miles one way a day to work and back) with a little around town driving I'm averaging about 18 hand calculated, 18.8 to 19 on the overhead, and that's keeping it at about 70.

I push it to 75 to 80 and it goes down into the 17's. I haven't touched a thing on the truck yet other then changing the oil once @ 5000 miles. I'm pretty happy with it.

 

bone stock on I-70 i got 20mpg today

 

Stock truck with S-67, towing and town last tank was 14.2 hand calc. Looking forward to shedding a few pounds on the exhaust system and gain another few..

 

stock was 9-10MPG in the city, 14MPG towing 10k pounds
modded is 14-16MPG in the city, 21MPG highway

 

Jason,

How is the 6.7L working really? I mean with just the DPF and no adBLUE is it really ok or does it need to have the EGR blocked and the DPF cored?