5.9 Liter CR Dodge Cummins 03-07 Discussion of 5.9 Liter Dodge Cummins Diesels with Common Rail Injection

Black oil

Old Mar 5, 2010 | 11:47 PM
  #1  
camocummins's Avatar
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Default Black oil

I just got my oil changed about 400miles ago and the oil is already black is this normal. I'm using Rotella.
 
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Old Mar 5, 2010 | 11:49 PM
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It's A diesel.... That's what they do.... Nothin to worry bout... Change the oil and idle it five minutes and it will be black.

Rhino.
 

Last edited by BLACK RHINO; Mar 5, 2010 at 11:52 PM.
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Old Mar 5, 2010 | 11:51 PM
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It means the oil is doing it's job. By that I mean it's suspending all the soot, like it's designed to do.
 
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Old Mar 6, 2010 | 12:12 AM
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^^ hes right ^^
 
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Old Mar 6, 2010 | 12:20 AM
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Yes sir all of the above
 
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Old Mar 6, 2010 | 06:39 AM
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I run a 2 micron polish filter and my oil still turns black quickly, I dont know what micron soot particles are but they are less than 2 micron for sure
 
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Old Mar 6, 2010 | 07:49 AM
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Get a bypass filter the FS-2500 is the best out there! Do the research on it and then decide if it's worth it.
 
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Old Mar 6, 2010 | 08:53 AM
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Soot can range from less than 1 micron to 5. The good bypass filters go to about 2 micron, including the 2500 and amsoil's. Soot will still be present but in very small particle size. Gives much longer oil life, but the small stuff will still accumulate over time. Still need to change the oil when that percentage of soot in oil approaches 5%.

The older trucks always used to go several thousand miles while still looking good on the dipstick but these late models are another story. May look concerning, but it's not as described above. It you tested the oil, the percentage soot would still be very low after a few thousand miles.
Just have to live with the black.
 
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Old Mar 6, 2010 | 09:09 AM
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yes, my bypass filter is the Amsoil BE100 and I love it, 10% slipstream off the finished side of the OEM filter then back to the sump.....keeps the whole system at 2 micron

Heith you have a PM I need more filters dude
 
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Old Mar 6, 2010 | 09:40 AM
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How much is that Amsoil BE100? and how much are the replacement filters?
 
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