6.7L Cummins Forum

It depends on the dpf regen. I have a 31ft fiver at about 9400lbs when the wife get done loading. I get about 13-14 at 70mph without regen in process and no wind. I get about 9.5 with regen in process and no wind.

My truck is completely stock.

08, 6.7l, QC, LB, 3.73, lt265r70-17e, 6spd auto

For the past 3 seasons I have towed a 30' TT weighing about 8,000 LBs loaded, plus about 1,000 LBs in the box, for about 70,000 KMs. This has been back and forth several times to the lower mainland of BC, trips into Saskatchewan, many times to the southern part of Alberta and a jaunt to Yellowstone through Montana and Wyoming. The truck gets between 10.8 and 14 Imperial MPG (hand calculated) depending on head wind. The trips up and down #2 highway to southern Alberta I have averaged 13 locked on cruise at 120 KPH. Unhooked and empty I get 19 to 21 on the hwy (#2) at 120 KPH. In town it gets 13 to 16 depending on traffic.
It should be noted that in town I do not use 5th and 6th gears but always use the EB. When towing it is always in TH with the EB on. Since 10,000 KMs the EGR has been unplugged, the air intake tube gutted and a 4" hole cut in the bottom of the air box. At the start of this year's trailer season I switched to an S&B CAI.
We just purchased a new Laredo 298RE which is about 1,000 LBs heavier than the old trailer, so it will be interesting to see the difference.

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2007 Ram 2500 QC 4x4 SLT TRX4-Offroad 6.7L Automatic. '08 Jeep WK 3.0L diesel-wife's DD.
1998 Jeep ZJ 4.0L Automatic Selectrac-project for our son. '98 Jeep XJ-my wife's former DD.
1965 Dodge Polara 880 Convertible 383 Automatic.

Ilwadd My stats are exactly same as yours

2010 6.7 I got 6 pulling a load of hay over hills around 65 mph, that night I took off EPA crap and installed h&s tuner and the next day took another load and got 9. My old 2000 would get 14 but would struggle to do 55. The scale said 30000 lbs.