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What kind of highway mileage are you guys getting on your 6.7L's. I'm looking at 2500 4x4s and want to know what to expect. I will do very limited towing, mostly just drive it on the freeway.... JOIN NOW TO REMOVE TRACER

6.7L fuel economy

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Old 06-02-2009, 10:39 AM

Default 6.7L fuel economy

What kind of highway mileage are you guys getting on your 6.7L's. I'm looking at 2500 4x4s and want to know what to expect. I will do very limited towing, mostly just drive it on the freeway.
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Old 06-02-2009, 12:28 PM
DslDeamon's Avatar
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when my truck was stock i was avg 18 highway and 16 in town with my mods now im getting around 21 on the high way and 17 in town hand calculated

DslDeamon's Sig:2011 Dodge ram 3500 4 door long bed all stock for now
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Old 06-02-2009, 10:24 PM
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Default fuel milage

Before my 22.5's all stock i was getting anywhere from 12-13 in town and 13-15 on road with cruise control on 60. Not worth a **** really. Now i get 10-12. 1 ton 4x4 6 speed manual. 3:55's i think?
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Old 06-03-2009, 03:29 PM
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I get about 16-17 usually on the hwy running 80-85 mph and don't really worry about it around town. I babied it up and down the road all last week running 65-72 mph and drove it like there was an egg shell between my foot and the pedal and got 21 mpg hand calculated. I was amazed to get over 700 miles outa the tank.

rcsr117tx's Sig:08 Dodge 2500 Mega 4x4, Black with Kahki int., 6.7L, Katzkin, 6-Sp Auto, S&B Int, Smarty, 3" lift, 295/70/17 Nitto Trail MT's, HID's, Ranchhand Bull Nose, Spray In, Nav, Amsoil Front to Back, Debadged, 20% tint, Smoked Recon Led Cab Lights, Python Alarm w/RS..........next up full Matte Black Wrap & possibly 8" Black Stacks
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Old 06-03-2009, 03:42 PM
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about 21 country driving. thanks to smarty
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Old 06-05-2009, 01:58 PM


I am avg'n 18.5 per overhead computer on the highway.
14-15 in city driving. I have tons of start and stops in the Dallas area...

DubT's Sig:2007.5 3500 C/C 4x4
rubber floor mats
Frontier Gear full replacements bumpers front & back
rhino lined bed
hide a ball gooseneck hitch
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Old 06-06-2009, 03:26 PM
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just hit 45k and the mpg are starting to slowly come up. for the first 30k i was getting 10-11 around town and 12-13 on the hwy. now i'm up to 13-13.5 around town and 14-15 on the hwy at 70-75. this is on my 07.5 with the 12'box/sail 4:10s the 6spd auto and a good load on it. i love this truck. its got to be the fasts bread truck around.

pullenplowen's Sig:04.5 & 07.5 3500's both gone 01 f250 xtra cab 4x4 7.3 bone stock
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Old 06-08-2009, 12:16 PM
MRowsh's Avatar
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MPG has direct relation with how heavy the right foot is, and percent of city to freeway driving.
I got over 30K, have gotten ride of all the problems! and using Smarty at level 3.

I am getting average weekly driving of 17.2 MPG. I fill up every 525 to 550 miles and hand calculate my consumptions.

FYI, I got one of those heavy right foots!!
If I drive like my age, I get at least over 19MPG average.

MRowsh's Sig:22 years Army Vet located in Noth Carolina. Adopted Southerner! And, loving it.
1. 1999 RAM-2500, 4X4 Loaded! Dual clutch/ Evil twin turbos, and Smarty too,
2. 2007 RAM-3500 MegaCab 6.7L SRW 4X4. Banks Ram Air Intake System, Autometer gauges, Airdog fuel system, And SMARTY!
3. VW Jetta TDI 2005
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Old 06-10-2009, 11:30 PM


Unfortunately, I am averaging 11-13 in town and 17-18 on the highway. less than 25K miles on my 6.7... I have heard you get a break around 50-60K. No mods - all stock
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Old 06-11-2009, 07:32 AM
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Are you in the Army or used to be in?
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