250 color of oil after change.
Thread Starter
Member
Joined: Nov 2015
Posts: 133
Likes: 11
From: Campbell, CA (San Francisco Bay Area)
2013 GLK250, 2022 Tesla MYLR, 1997 Correct Craft Ski Nautique
250 color of oil after change.
I just did my 30,000 mile service, including changing the oil. After I changed the oil, I drove 9 miles, and then looked at the dipstick. It was already black. Is that normal? This is my first diesel.
Senior Member
Joined: Jul 2014
Posts: 422
Likes: 61
From: South East US.
2015 GLK350
Yes, it gets black very quickly especially if you suck the oil out through the dipstick as many do these days. The more old oil and residue left in the engine, the quicker it will turn black.
Senior Member
Joined: Nov 2002
Posts: 334
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From: Northern California
2016 GLE300d 4Matic
I've changed diesel engine oil the old fashioned way and it is still charcoal black after a few hundred miles. Send it to Blackstone Labs when you change you oil to make sure it is still protecting the engine. My GLK is gas but I've had old Mercedes diesels in years past as well as trucks. They all had oil that turns black right away after changing. It still did it's job for the many thousands of miles. They were all pan drained until fully empty too. Made no difference.
Senior Member
Joined: Feb 2013
Posts: 375
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From: Michigan
2014 GLK250BT, Polar White; 2016 GLE 300d, Polar White
This is already discussed on other tread. It's a diesel - do not worry.
Thread Starter
Member
Joined: Nov 2015
Posts: 133
Likes: 11
From: Campbell, CA (San Francisco Bay Area)
2013 GLK250, 2022 Tesla MYLR, 1997 Correct Craft Ski Nautique
Thanks all. I always drain the pan when I do oil changes, so was surprised with it black again at 9 mikes, I've always changed all my cars with synthetics at 5k miles regardless of schedule, so wondering if I should do the same thing with this diesel. Or am I wasting money? Doing it only every 10k miles would be nice but that stuff sure is dirty.
Senior Member
Joined: Jul 2014
Posts: 422
Likes: 61
From: South East US.
2015 GLK350
It would not hurt to change the oil and filter more often if it makes you feel better.
All diesels turn the oil black very quickly so don't let the color make you think it is dirty. A better indicator is the amount of metal particles and ash in the oil, but you need to send it off for analysis to determine those levels.
Be more concerned with the quality of the fuel that you are getting. One bad tank of fuel with too high of a sulphur content will raise hell with the emissions system. Replacing a blocked DPF or having the carbon cleaned from the EGR passages is not cheap.
All diesels turn the oil black very quickly so don't let the color make you think it is dirty. A better indicator is the amount of metal particles and ash in the oil, but you need to send it off for analysis to determine those levels.
Be more concerned with the quality of the fuel that you are getting. One bad tank of fuel with too high of a sulphur content will raise hell with the emissions system. Replacing a blocked DPF or having the carbon cleaned from the EGR passages is not cheap.
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Thread Starter
Member
Joined: Nov 2015
Posts: 133
Likes: 11
From: Campbell, CA (San Francisco Bay Area)
2013 GLK250, 2022 Tesla MYLR, 1997 Correct Craft Ski Nautique
It would not hurt to change the oil and filter more often if it makes you feel better.
All diesels turn the oil black very quickly so don't let the color make you think it is dirty. A better indicator is the amount of metal particles and ash in the oil, but you need to send it off for analysis to determine those levels.
Be more concerned with the quality of the fuel that you are getting. One bad tank of fuel with too high of a sulphur content will raise hell with the emissions system. Replacing a blocked DPF or having the carbon cleaned from the EGR passages is not cheap.
All diesels turn the oil black very quickly so don't let the color make you think it is dirty. A better indicator is the amount of metal particles and ash in the oil, but you need to send it off for analysis to determine those levels.
Be more concerned with the quality of the fuel that you are getting. One bad tank of fuel with too high of a sulphur content will raise hell with the emissions system. Replacing a blocked DPF or having the carbon cleaned from the EGR passages is not cheap.
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