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Black Oil #4633424
01/13/18 10:42 AM
01/13/18 10:42 AM
Joined: Apr 2010
Posts: 15
USA
Jason1221 Offline OP
Jason1221  Offline OP
Joined: Apr 2010
Posts: 15
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!

Last edited by Jason1221; 01/13/18 10:43 AM.
Re: Black Oil [Re: Jason1221] #4633443
01/13/18 10:58 AM
01/13/18 10:58 AM
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
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

Last edited by Snagglefoot; 01/13/18 11:12 AM.

If you want the job done right......do it yourself.
Re: Black Oil [Re: Jason1221] #4633444
01/13/18 10:58 AM
01/13/18 10:58 AM
Joined: Jun 2004
Posts: 1,553
Indiana
farrarfan1 Offline
farrarfan1  Offline
Joined: Jun 2004
Posts: 1,553
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


Last edited by wwillson; 03/14/18 09:43 PM. Reason: shorten URL
Re: Black Oil [Re: Jason1221] #4633454
01/13/18 11:10 AM
01/13/18 11:10 AM
Joined: Jun 2005
Posts: 5,251
North Texas
ARB1977 Offline
ARB1977  Offline
Joined: Jun 2005
Posts: 5,251
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 / Honda filter
Re: Black Oil [Re: Snagglefoot] #4633459
01/13/18 11:13 AM
01/13/18 11:13 AM
Joined: Apr 2010
Posts: 15
USA
Jason1221 Offline OP
Jason1221  Offline OP
Joined: Apr 2010
Posts: 15
USA
At 5000 miles it was 30%

Re: Black Oil [Re: Jason1221] #4633466
01/13/18 11:21 AM
01/13/18 11:21 AM
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
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


If you want the job done right......do it yourself.
Re: Black Oil [Re: Jason1221] #4633468
01/13/18 11:22 AM
01/13/18 11:22 AM
Joined: Feb 2008
Posts: 4,727
Texas
FZ1 Offline
FZ1  Offline
Joined: Feb 2008
Posts: 4,727
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.

Re: Black Oil [Re: Jason1221] #4633533
01/13/18 12:02 PM
01/13/18 12:02 PM
Joined: Dec 2011
Posts: 1,742
War Eagle
toneydoc Offline
toneydoc  Offline
Joined: Dec 2011
Posts: 1,742
War Eagle
Mobil1 is great oil. Just doing its job. Follow your OLM and the engine will be just fine


1994 Jeep 160k Mobil 5000 5w30
2014 Camry 35k Havoline 5w20
2018 Jeep Cherokee 2k FactFill
2014 HD Ultra 41k Mobil1 15w50
2012 Rav4 37k Pennzoil Platinum 5w20
Re: Black Oil [Re: Jason1221] #4633556
01/13/18 12:35 PM
01/13/18 12:35 PM
Joined: Sep 2014
Posts: 1,460
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,460
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?

Re: Black Oil [Re: Jason1221] #4633558
01/13/18 12:37 PM
01/13/18 12:37 PM
Joined: Mar 2016
Posts: 1,392
toronto
PeterPolyol Offline
PeterPolyol  Offline
Joined: Mar 2016
Posts: 1,392
toronto
Mobil 1 is incredible. It's engine oil, isn't that amazing?


"Nobody else has responded to you. Nobody has defended your position. Perhaps that's a clue"
Re: Black Oil [Re: WobblyElvis] #4633559
01/13/18 12:38 PM
01/13/18 12:38 PM
Joined: Apr 2010
Posts: 15
USA
Jason1221 Offline OP
Jason1221  Offline OP
Joined: Apr 2010
Posts: 15
USA
No sir it dont use a drop of oil

Re: Black Oil [Re: Snagglefoot] #4694132
03/13/18 11:58 PM
03/13/18 11:58 PM
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
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.


If you want the job done right......do it yourself.
Re: Black Oil [Re: Jason1221] #4694187
03/14/18 03:27 AM
03/14/18 03:27 AM
Joined: Jan 2011
Posts: 2,749
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,749
N.Ohio
Congratulations, your oil is doing what it is engineered to do. Don't worry about it.


The "thinking" man's friend.
Re: Black Oil [Re: Jason1221] #4767573
05/25/18 07:04 AM
05/25/18 07:04 AM
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,507
SE British Columbia, Canada
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 %.




If you want the job done right......do it yourself.
Re: Black Oil [Re: Jason1221] #4767947
05/25/18 02:37 PM
05/25/18 02:37 PM
Joined: Nov 2005
Posts: 874
Senoia, GA
thooks Offline
thooks  Offline
Joined: Nov 2005
Posts: 874
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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