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#4633424 - 01/13/18 09:42 AM Black Oil
Jason1221 Offline


Registered: 04/27/10
Posts: 15
Loc: USA
Purchased a 2014 chevy 2500hd with a 6.0 engine with 90,000 miles on it. I knew the truck and all are hwy miles the old owner had always changed the oil with mobil 1 5w-30 full synthetic every 5000 miles. Iv done two oil changes with the same oil in it and before i get 3000 miles on it the oil gets really really really black. Has anyone ever had this issue before? Engine runs great!


Edited by Jason1221 (01/13/18 09:43 AM)

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#4633443 - 01/13/18 09:58 AM Re: Black Oil [Re: Jason1221]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1777
Loc: Alberta
At 5000 miles how far are you along on the oil monitor, in percentage. I have essentially the same engine with 150,000 miles in a 2008 3/4 ton Suburban. Just had a look; at 70 % remaining itís still light brown. Always used Synthetic 5-30, often M-1. Iíll monitor this and let you when it turns black, and yes, when I change oil at 0 % , itís black.

SF


Edited by Snagglefoot (01/13/18 10:12 AM)

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#4633444 - 01/13/18 09:58 AM Re: Black Oil [Re: Jason1221]
farrarfan1 Offline


Registered: 06/24/04
Posts: 1551
Loc: Indiana
The below is what you get if you google "black oil bobistheoilguy.com". It will take a while to read all of the threads on this subject.

Link



Edited by wwillson (03/14/18 09:43 PM)
Edit Reason: shorten URL

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#4633454 - 01/13/18 10:10 AM Re: Black Oil [Re: Jason1221]
ARB1977 Offline


Registered: 06/12/05
Posts: 5170
Loc: North Texas
Get a uoa done if youíre concerned.
_________________________
2015 Tacoma 4.0L 60K (as of 02/23/18)
Amsoil SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Factory filter

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#4633459 - 01/13/18 10:13 AM Re: Black Oil [Re: Snagglefoot]
Jason1221 Offline


Registered: 04/27/10
Posts: 15
Loc: USA
At 5000 miles it was 30%

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#4633466 - 01/13/18 10:21 AM Re: Black Oil [Re: Jason1221]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1777
Loc: Alberta
Originally Posted By: Jason1221
At 5000 miles it was 30%


OK, Iíll report back when mine is definitely black, or at 30%, Whichever comes first. Currently putting on about 1,000 miles per month.

SF

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#4633468 - 01/13/18 10:22 AM Re: Black Oil [Re: Jason1221]
FZ1 Offline


Registered: 02/07/08
Posts: 4727
Loc: Texas
I think the Boron in the add pack is turning is turning the oil black. The Boron is also plating you cylinder bores.. Not a bad thing.

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#4633533 - 01/13/18 11:02 AM Re: Black Oil [Re: Jason1221]
toneydoc Offline


Registered: 12/16/11
Posts: 1696
Loc: War Eagle
Mobil1 is great oil. Just doing its job. Follow your OLM and the engine will be just fine
_________________________
1994 Jeep 158k Mobil 5000 5w30
2014 Camry 32k QS AD 5w30
2018 Jeep Cherokee 1k factory fill
2014 HD Ultra 35k Mobil1 15w50
2012 Rav4 35k PP 5w20

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#4633556 - 01/13/18 11:35 AM Re: Black Oil [Re: Jason1221]
WobblyElvis Online   content


Registered: 09/23/14
Posts: 1355
Loc: Toronto Canada
Cut open the next used oil filter and look for black/carbon/soot in the pleats of the media. Also look for oil on the throttle plate of the throttle body. These things suggest combustion products are blowing by the piston rings and contaminating the oil and quickly turning it black. The PCV system should be checked.
Does the engine consume oil?

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#4633558 - 01/13/18 11:37 AM Re: Black Oil [Re: Jason1221]
PeterPolyol Offline


Registered: 03/06/16
Posts: 1345
Loc: toronto
Mobil 1 is incredible. It's engine oil, isn't that amazing?

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#4633559 - 01/13/18 11:38 AM Re: Black Oil [Re: WobblyElvis]
Jason1221 Offline


Registered: 04/27/10
Posts: 15
Loc: USA
No sir it dont use a drop of oil

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#4694132 - 03/13/18 11:58 PM Re: Black Oil [Re: Snagglefoot]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1777
Loc: Alberta
Originally Posted By: Snagglefoot
Originally Posted By: Jason1221
At 5000 miles it was 30%


OK, Iíll report back when mine is definitely black, or at 30%, Whichever comes first. Currently putting on about 1,000 miles per month.

SF


Just checking back. Iím at 30% left. Getting darker but I wouldnít call it black just yet.

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#4694187 - 03/14/18 03:27 AM Re: Black Oil [Re: Jason1221]
Lubener Offline


Registered: 01/22/11
Posts: 2577
Loc: N.Ohio
Congratulations, your oil is doing what it is engineered to do. Don't worry about it.
_________________________
The "thinking" man's friend.

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#4767573 - 05/25/18 07:04 AM Re: Black Oil [Re: Jason1221]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1777
Loc: Alberta
Well, finally got down to 0 %. And yes, it is Black.. The driving was all highway with just a bit of city driving. Funny how it seems dark brown on the dipstick but black in the container. Blot samples on paper towels are light brown. The mileage was 10,200 miles at 0 %.



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#4767947 - 05/25/18 02:37 PM Re: Black Oil [Re: Jason1221]
thooks Offline


Registered: 11/30/05
Posts: 833
Loc: Senoia, GA
The previous owner wasn't doing 5k mile intervals with Mobil 1.

I bet he was going per the OLM and using at best Mobil 5000.

If someone used Mobil 1 at 5k intervals, the engine should be spotless and the oil shouldn't be BLACK at 3k miles.

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