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Old 12-23-2013, 12:04 AM
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Oil Thin and Dark

When checking the oil I found it unusually dark and thin. Truck had about 4000 miles on it. When changing, it poured out like crazy and had a burnt smell, very dark. A billion oil changes on my 6.0 and not one looked like that

Anyone else seeing this? Normal for the 6.7 with just 4000 miles?
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Old 12-23-2013, 02:49 AM
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Fuel dilution will thin the oil. Did it reek of diesel? What weight are you running?


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Old 12-23-2013, 03:14 AM
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didnt notice any diesel smell. it smelled more burnt than anything. it was the original oil that came in the truck. i replaced it with the Rotella T6 i had left over from my 6.0


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Old 12-23-2013, 05:46 AM
mcd mcd is offline
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Fuel in the oil, as a by product of the regen process. You will also probably notice that the truck will "make oil", due to the fuel volume.

Seems like it happens pretty quickly too. After an oil change, I notice it doesnt take long for the oil on the dipstick to get very black.

I am sure it is not good, but dont know how bad it is for the 6.7 either. I know it is pretty common, unless you are deleted.
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Old 12-23-2013, 07:17 AM
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I change my oil every 4500 miles and have never once smelled burning or had a Diesel smell. BTW, at 4500 miles, it doesn't make any oil either. I use dino oil not synthetic as I don't haul heavy loads. if your not comfortable with your oil, have it anaylized and then you will know whats going on.
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Old 12-23-2013, 11:20 AM
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^^Good advice thanks^^ Sounds like a delete is in my near future


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