Oil is black after changed. What to do? - Page 2 - PeachParts Mercedes-Benz Forum

daw_two · #16 03-19-2010, 07:17 AM

Drive It!!!
Change oil every 3,500 miles or 5,000 miles with a new filter!

Drive It MORE!!

Stevo · #17 03-19-2010, 09:50 AM

Quote:

Originally Posted by vstech

really?
the 240's don't have even a small cooler?
Hmmm. there is still a lot of black as coal oil in all the passages, but you would think without the cooler you could get at least a day of almond oil... how much oil do you think is in the IP?

Euro 240Ds didn't come with oil coolers so there must be other places for the old oil too hide, dont know about the the IPs but they must hold at least a cup.

The oil in my truck's Cummens stays honey colored for 3 or 4 K with only a slight darkening.

shertex · #18 03-19-2010, 09:59 AM

When I was a completely ignorant new diesel owner in 2003...took it in for its first oil change....got it back and saw the jet black oil....took it back to the service center claiming that apparently they hadn't changed my oil.

As Dr. Booth used to say, the blackness of the oil is a feature, not a flaw.

vstech · #19 03-19-2010, 10:15 AM

Quote:

Originally Posted by Stevo

Euro 240Ds didn't come with oil coolers so there must be other places for the old oil too hide, dont know about the the IPs but they must hole at least a cup.

The oil in my truck's Cummens stays honey colored for 3 or 4 K with only a slight darkening.

yeah, but that truck is DI, and fuel rail, also it's got 12 quarts or something... and it's and industrial engine. drool...

Stevo · #20 03-19-2010, 03:49 PM

Quote:

Originally Posted by vstech

yeah, but that truck is DI, and fuel rail, also it's got 12 quarts or something... and it's and industrial engine. drool...

I wish I had paid closer attention to the heavy duty engines I worked around on tugs, I wonder about "Cats", Jimmys, and the others. Does their oil turn black fast

I remember Marshell B. talking about the soot being suspended in the lub oil, which "was OK"

b2948kevin · #21 03-19-2010, 03:59 PM

I'm going to agree and support the consensus here. There's lots of places that the old oil is going to stick. On the surface of every part in your lubrication system, for example. Soot is very fine and it doesn't take a lot of it to turn your new oil black. I was surprised when I saw this on my first diesel as well until I understood that this was completely normal.

If you want to get it totally clean, you could probably do an oil change, run the car around the block,and rinse and repeat a few times. If you suspect that something's wrong with the oil, you can always take a sample and send it to a lab for analysis.

kerry · #22 03-19-2010, 04:26 PM

Quote:

Originally Posted by Stevo

I wish I had paid closer attention to the heavy duty engines I worked around on tugs, I wonder about "Cats", Jimmys, and the others. Does their oil turn black fast

I remember Marshell B. talking about the soot being suspended in the lub oil, which "was OK"

My CAT 3208 does not get black as fast.

kerry · #23 03-19-2010, 04:27 PM

Quote:

Originally Posted by barry123400

Blacker than a witches ___ comes to mind. .

I knew they were cold. I didn't know they were black.

Fulcrum525 · #24 03-19-2010, 04:41 PM

Quote:

Originally Posted by daw_two

Drive It!!!
Change oil every 3,500 miles or 5,000 miles with a new filter!

Drive It MORE!!

I change mine every 3,000 to 4,000 miles (At the most, normally I get to it around 3,500) I overkill though and change the filter with every change.

barry123400 · #25 03-19-2010, 04:45 PM

Quote:

Originally Posted by kerry

I knew they were cold. I didn't know they were black.

I will have to accept your judgement. I never got to know one that well.

This is a dirty oil thread remember. Seems to be still gathering momemtum.

mi benz · #26 03-19-2010, 05:18 PM

the oil is black because it is suspending soot. if it wasn't black i'd be worried.

bobodaclown · #27 03-19-2010, 05:46 PM

Quote:

Originally Posted by Renntag

After each oil change, the oil is immediately black again. I dropped the pan, cleaned and reinstalled. Same result.

What can be done to have cleaner appearing oil? Or should I just give up now?

I have thought about using the "10 minute Engine flush" off the shelf and then running a short period with ATF.

Thoughts?

Thanks for any input.

Give up, and enjoy the ride.

Don't use "10 Minute Engine Flush or ATF.

Change oil and filter and enjoy the ride.

b2948kevin · #28 03-19-2010, 05:51 PM

I agree with bobo above, but if you were going to flush with anything, I don't see anything that would be more cost effective than just some cheap oil from Wal Mart. Not worth the risk of possibly contaminating something.

Renntag · #29 03-20-2010, 01:56 PM

Thanks everyone.

My question wasnt driven by alarm or over concern. I change the oil, drive and repeat. My Duramax, Cummins, and 6.5TD stay clean much longer. The Cummins and the Duramax make it clean the furthest.

JHZR2 · #30 03-20-2010, 11:40 PM

Think about how much food coloring it takes to make a glass of water colored... Or how much spilled oil or gas it takes to contaminate a large body of water.
Youre talking ratios... A little bi of susprnded soot makes a lot of oil black. The oil has an additive package that suspends it. Even after thousnds of miles, it is still less than 2% soot suspended in the oil. A little goes a long way to stain the oil. It is within design.