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Technical Info: 3rd Generation: DRIVETRAIN Technical discussion of third generation (2003 - 2007) engine and drivetrain questions, solutions and upgrades.
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Old 2 Weeks Ago
Jim Hodge Jim Hodge is offline
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Default Oil is black too quickly

Have had 2 97's and a 99 Dodge Ram with the diesel. Bought a 2005 with less than 67K and hoped it to be the one I take to the grave. At 69K I changed the oil and filter, exactly when the window sticker said it was due. Maybe have driven it 6 to 8 miles and the oil is as black as before I changed it. A friend with a low mileage 2005 has the same thing. All the other Dodge diesels would have clean oil for a period of time before it started picking up the carbon. Is this normal? What causes it? Thanks JH
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My 06 is black as well....have considered a secondary filtration system but haven't installed one as of yet. Anyone else????
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Well...I don't have the answer for that, but I do know my '07, with 372,000 miles has stayed impressively clean for over 1000 miles after an oil change while working it's fender flares off!
Not sure what all the differences are between the 07, 6.7, and an 05, 5.9...

I do remember MAX showing me how one of them has an oil passage cast into the oil pan that doesn't, or shouldn't drain when the oil is changed.
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Jim Hodge Jim Hodge is offline
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Well, from the one reply, it sounds like this is 'normal'. What is different with the common rail engine that causes this to occur? By pass filter using tp would be interesting to try. Sure don't need anything else cluttering what space remains under the hood. Is this an issue with the pre'05' 24 valve engines. I know it wasn't in 99.
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Max would know for sure, but I think the 04.5 to 07 5.9 had the Camshaft ground to provide an "In cylinder EGR" type function. The Automotive Truck version of the 5.9 after 2002 had EGR much like the 6.7 does in ram, While the emissions regulations are different between automotive truck and light duty pick up truck, Cummins and dodge made it a much longer time than anyone else before they had to add a full EGR system to the engine.
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Jim Hodge Jim Hodge is offline
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A camshaft grind? What ever it is, I sure notice a difference in the exhaust smell vs the older 5.9 engines. What surprises me about this set up is the distance between oil changes. Seems like the older Dodge diesels, that I have owned, had a 3k to 5k range between changes, while the owners manual on the 05 says 7.5k to 15k depending on type of driving. Apparently the extra carbon in the oil must not hinder the lube quality of the oil, does it help in that case? There are a lot of quirks about these common rail engines, I need to spend more time on the learning curve. Is there a Sticky about the 05 to 07.5 models that explains the engine and how it has changed? JH
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Of the 2 1st gens and 1 2nd gen I've run, every one you can change the oil, start it, shut it down, and the oil would be black. Mileage ranging from 145K to 300K.
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Quote:
Originally Posted by Jim Hodge View Post
A camshaft grind? What ever it is, I sure notice a difference in the exhaust smell vs the older 5.9 engines. What surprises me about this set up is the distance between oil changes. Seems like the older Dodge diesels, that I have owned, had a 3k to 5k range between changes, while the owners manual on the 05 says 7.5k to 15k depending on type of driving. Apparently the extra carbon in the oil must not hinder the lube quality of the oil, does it help in that case? There are a lot of quirks about these common rail engines, I need to spend more time on the learning curve. Is there a Sticky about the 05 to 07.5 models that explains the engine and how it has changed? JH
The catalyst that was installed from the factory beginning halfway through 04 is what makes the exhaust smell different

Heavy duty on highway EGR engines are going 60,000 miles on oil changes these days.
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Jim Hodge Jim Hodge is offline
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WOW! Guess I'm just too old school. I know things have gotten better over time, better tolerances, better materials, better controls thru electronics, etc. But, dirty oil is shocking to an ole fart like me. Guess I will take your word for it and not get too rattled. One other thing, the owners manual will give no credit for synthetic oil. It lists the same change intervals regardless of oil type. One size fits all, sounds like our federal goberment. Testing of the oil would probably give a different picture than what Dodge paints. I am thrilled with the 7.5k mile minimum between changes, that's right up there with some of today's gasers. Really not trying to stir the water on this topic, just was struck with how dirty the oil appeared right after the change.
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Don't loose to much sleep over it Jim. Most diesel oils will turn black some sooner than others.
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