BLACK engine oil, normal??? - Dodge Cummins Diesel Forum

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Old 07-20-2008, 10:17 PM   #1 (permalink)
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BLACK engine oil, normal???

I change my oil every 6000 mi. with Amsoil 15w-40. At every oil change the oil is nasty black with soot. After I fill it with fresh oil and run it for a minute I check it again and its all ready black again.
This is normal right? Should I be concerned?
Will a bypass filter help?
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Old 07-20-2008, 10:19 PM   #2 (permalink)
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Yes absolutely normal and yes a bypass will help need to be concerned the CR's are like that....
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Old 07-20-2008, 10:24 PM   #3 (permalink)
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All diesels are like that.
2000 2500 ext. cab short bed, AFE cold air intake, single 6 inch stack, SPS 62 turbo, FASS 95, Scheid Lightning II's, .093 connector tubes, Maxspool valve springs, A1 head studs, Fire ringed head, Adrenaline, HP intercooler boots, 6 speed with a Haisley Street puller clutch, custom trac. bars, draw straw
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Old 07-20-2008, 10:25 PM   #4 (permalink)
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bypass will help some but that is just a diesel thing nothing to worry about.
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Old 07-20-2008, 10:29 PM   #5 (permalink)
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Totally normal.
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Old 07-20-2008, 10:45 PM   #6 (permalink)
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Black oil....normall!!! Changing Amsoil oil at 6k intervals.......waste of Even without a bypass, Amsoil oils usually go much longer than that and are still analytically "good"!! And I don't run Amsoil engine oil either!!!!!
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Old 07-21-2008, 12:05 AM   #7 (permalink)
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doesn't it also get blacker sooner because of the engine trapping the exhaust in the cylinder!
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Old 07-21-2008, 12:28 AM   #8 (permalink)
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Yep, my Volkswagen's oil is pitch black 5 min. after an oil change too. Actually the Cummins seems to stay cleaner looking longer than the VW.
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Old 07-21-2008, 12:44 AM   #9 (permalink)
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Originally Posted by DevilDogDiesel View Post
All diesels are like that.
I wouldn't go that far... I have been around diesels for more than a day or two and they dont all do that... My dads 3406 Cat would stay golden for hundreds of hours with a bypass.... The HPCR is a different breed based on in-cylinder EGR.

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Old 07-21-2008, 12:47 AM   #10 (permalink)
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mine was black after startup before I had all thes truck it's amber for a good 10 miles!!!!
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so I'm having a rough decade...... oh well.
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Old 07-21-2008, 12:59 AM   #11 (permalink)
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that's just the way these third gens are.they have a "in cam egr".........check this link out.

in cam egr:thumbsup

hope this helps.

a bypass wont clean it me i have one. but what i t will do is filter out all the soot in oil down to like 3microns or less. i am able to achieve 30,000miles + on the same oil. could go longer but that's just were i like to change. good luck.
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Old 07-21-2008, 08:11 AM   #12 (permalink)
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Mine oil always turned black right away both on my current truck and my last truck right after the oil change.

But since adding a Smarty my oil has been much cleaner, I don't know if I should be happy or worried that something is wrong?

I am at 7500mi on my synthetic and getting ready to change, and yet when I pull the dipstick the oil is still fairly clean. I can see all the the cross hatch and low line no problem . I will try to take a pic and post it.
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