6.7L Cummins Forum

09 reg cab,342grs, 6spd stk. live and work in the pine creek area of nrth centrl Pa. winter miliage high 16s to lo 17s, non- winter time high 17s to lo 18s,up to 22 on highway trips. 16mpg when towing dump trl, with combined gross at 18,500lbs. all trks will very some.

2011 with 3017 miles full del set on tow getting17.8

13 to 15mpg around town, 18 on the freeway driving 75mph, and
12 pulling,

Should I leave the exhaust brake on always I drive 7o mi a day back n forth to work almost all highway. I haven't towed anything as of yet have 16,000 mi on truck since Aug 2011 ...

tHERE STILL GIVING THAT PROBLEM , tHE ONLY WAY IS RIP IT ALL OUT . BETTER FUEL MILEAGE

The ex brake works off the turbo, if your running empty, I would suspect your creating more work for the turbo, if your not desending hills, or needing engine braking on icey roads, I don't see the point in using it.

just getting back to Minnesota visiting my son in Durango Colorado. My 07 was bought used in Texas with 62K miles. Once purchased I was informed that the Turbo and DPF had been replaced. So I had the dealer in MN flash the computer and no problems. The batteries needed to be replaced and when that was done the check emission lite came on. Was able to reset it and no problem. so when I was heading to Colorado, I went thru Rocky Moutain Nat Park with a 2900lb camper on the back and a 1100lb trailer the Jake brake worked great and I was avw=eraging about 13 mpg going up the hill. When I got to the summit the check engine lite came on. So I kept driving and the lite stayed lit. Well now I'm in Aderdeen So Dak and the lite just went out on its own. Go figure. Any way I love the manual 6 speed and the power this thing has. I still own a 1995 V-10 and it has great power also, but not like this truck.

It is a good idea at least on a frequent basis to run the EB. This will force the Variable Geometry Blades in the turbo to cycle its full movement and help keep carbon from building up at causing the blades to stick. If they stick, then the turbo needs to be cleaned or replaced. I have 134,000 miles and still on original turbo and never had it cleaned. I run the EB almost daily at least on part of the driving. The only extra work on the turbo is when the EB is working during slow down, and its designed for this.

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If you bad mouth farmers just make sure your mouth is empty
07.5 2500 quad, sb, auto,4x4, Big Horn. wheel to wheel nerf bars, amp bumper step
08 Jazz 36' 5er, 12,000lbs
28' PJ gooseneck,22,400 gvw

They are still having the problem. If you are freeway driving they are fine. I you 4x4 around you are not so lucky. That is the problem I am having

23-24 mpg hand calculated in Amarican mpg. But it's chipped I never had dpf issues but I had lots of egr and egr cooler plugging problems. I put the programmer in at 100000 km and now at 243000 km. runs great.

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2008 laramie 6.7 s&b cai , smarty junior , dpf delete 267000km and counting one turbo and one torque converter 24mpg
2012 larami 6.7 not deleted 16mpg