Dodge/Ram Cummins 6.7 Reliablility/Fuel Economy - The Combine Forum
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post #1 of 40 (permalink) Old 02-01-2011, 11:13 AM Thread Starter
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Dodge/Ram Cummins 6.7 Reliablility/Fuel Economy

Simply put: - Is anyone having problems with their 6.7's? I'm "blessed" with a 2008 2500 Quad Cab 4WD and have had nothing but problems from about 4,000 km's to present (currently at about 72k). Aside from the predictable DPF clogging, constant error codes, horrible fuel economy and "blank stares" from the dealer whenever I bring (or tow) the truck back to the dealership. (Seems NOBODY is having ANY problems) This represents the 4th Dodge Cummins I've owned and the previous 3 were excellent units. The only upside is that it's all mine, my wife won't drive it!
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post #2 of 40 (permalink) Old 02-01-2011, 11:20 AM
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Simply put: - Is anyone having problems with their 6.7's? I'm "blessed" with a 2008 2500 Quad Cab 4WD and have had nothing but problems from about 4,000 km's to present (currently at about 72k). Aside from the predictable DPF clogging, constant error codes, horrible fuel economy and "blank stares" from the dealer whenever I bring (or tow) the truck back to the dealership. (Seems NOBODY is having ANY problems) This represents the 4th Dodge Cummins I've owned and the previous 3 were excellent units. The only upside is that it's all mine, my wife won't drive it!
Get a DPF delete and your milage will go up and no more clogging. I have a 2007
And I went from 14 to around 20-22 depending on how I drive
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post #3 of 40 (permalink) Old 02-01-2011, 12:17 PM
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I have an 07 dodge 3500 with 6.7 cummins and have had very little trouble. It is important to keep it plugged in during the winter and make sure you buy the dodge winterfront that goes directly in front fo the radiator. This engine needs to be warm to keep dpf clean. I always turn on the high idle and the jake brake when warming it up or during extended idle to keep the engine temp up.

Takes about 80000km (50000 miles) before the engine starts to break in. Took mine on long trip last week and it showed 12.2l/100km, which is over 20 mpg.

Using a good winter 0w-40 oil helps the motor warm up quicker and keep the dpf cleaner.

Fuel economy was brutal on this truck before 80000 km.
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post #4 of 40 (permalink) Old 02-01-2011, 02:20 PM
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I have a 2010 Ram 3500 SRW with 6 speed auto.
Running around with no trailer Summer = +/- 17.5 MPG CDN
Winter = +/- 15.0 MPG CDN
Towing 15,000 lb gooseneck cattle trailer runs around 11-12.5 MPG CDN
I've had it back to the dealler once for a couple of recalls
It's worked real good for me in the 52,000 km I have on it
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post #5 of 40 (permalink) Old 02-01-2011, 02:48 PM
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I have a 2010 Ram 3500 SRW with 6 speed auto.
Running around with no trailer Summer = +/- 17.5 MPG CDN
Winter = +/- 15.0 MPG CDN
Towing 15,000 lb gooseneck cattle trailer runs around 11-12.5 MPG CDN
I've had it back to the dealler once for a couple of recalls
It's worked real good for me in the 52,000 km I have on it
I think that kind of mileage would be similar with the other brands out there. Very close to our mileage with our GM.
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post #6 of 40 (permalink) Old 02-01-2011, 05:05 PM Thread Starter
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Get a DPF delete and your milage will go up and no more clogging. I have a 2007
And I went from 14 to around 20-22 depending on how I drive

I've heard mention of this DPF delete mod before! Would you happen to know if it voids the warranty?

Thanks,
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post #7 of 40 (permalink) Old 02-01-2011, 05:11 PM Thread Starter
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Originally Posted by bud View Post
I have an 07 dodge 3500 with 6.7 cummins and have had very little trouble. It is important to keep it plugged in during the winter and make sure you buy the dodge winterfront that goes directly in front fo the radiator. This engine needs to be warm to keep dpf clean. I always turn on the high idle and the jake brake when warming it up or during extended idle to keep the engine temp up.

Takes about 80000km (50000 miles) before the engine starts to break in. Took mine on long trip last week and it showed 12.2l/100km, which is over 20 mpg.

Using a good winter 0w-40 oil helps the motor warm up quicker and keep the dpf cleaner.

Fuel economy was brutal on this truck before 80000 km.
Great to hear there might be some relief on the mileage! Currently, I'm averaging about 17 mpg (Canadian gallon) which would equate to about 14.5 per American gallon, and thats empty. I expected more with the 6-spd auto and 3.73 ratio. I've been running with the Jake on as often as possible and have kept it plugged in. I'll try putting a winter front on it to see if that helps!
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post #8 of 40 (permalink) Old 02-01-2011, 05:13 PM Thread Starter
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Originally Posted by Big Cob View Post
I have a 2010 Ram 3500 SRW with 6 speed auto.
Running around with no trailer Summer = +/- 17.5 MPG CDN
Winter = +/- 15.0 MPG CDN
Towing 15,000 lb gooseneck cattle trailer runs around 11-12.5 MPG CDN
I've had it back to the dealler once for a couple of recalls
It's worked real good for me in the 52,000 km I have on it
I've been told by more than one credible source that it's the 07.5's and 08's that seem to be having the issues. My friend has an 09 and its been relatively trouble-free, though his mileage still leaves a lot to be desired. Like me, he's running around 17 mpg (Canadian gallon)
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post #9 of 40 (permalink) Old 02-01-2011, 05:45 PM
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I have a friend that just removed the egr and dpf/cat from his 08 6.7 and milage went from 13 to 17.5 mpg us. It runs better and sounds better.
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post #10 of 40 (permalink) Old 02-01-2011, 06:40 PM
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My work truck is an '09 5500 single cab, 4x4 with 4.88 gears. What a POS! I know it's not Cummins' fault that the 6.7 is a plugged up, exhaust eating, multi plexed, EPA garbage. I'll take my '94 and '99 Cummins powered Rams before I will ever own one of these units for myself. What a shame!
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