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Old 09-12-2005, 03:05 PM
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Engine oil black after only 1000 miles

The engine oil in my wifes 84' 300dt has turned black after only 1000 miles. I used rotella t during the oil change. Is this color change normal? The car is in great shape and has done about 200,000 miles.


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Old 09-12-2005, 03:16 PM
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if you would have checked it would have been black after 100 miles.

Yes its normal for a diesel and nothing to be concerned about.
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Old 09-12-2005, 03:16 PM
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It's normal, usually happens alot sooner than 1000 miles!
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Old 09-12-2005, 03:39 PM
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That's not bad. My oil turns black right away.

1984 300SD Turbo Diesel 150,000 miles

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Old 09-12-2005, 03:44 PM
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Once you go Black

Hell mine is black after I start it up immediately after an oil change....
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Old 09-12-2005, 03:51 PM
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remember what they say ....

black is beautiful baby !!
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Old 09-12-2005, 03:51 PM
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It would turn black quickly anyway, but the fact that most people do not drain t he oil cooler during an oil change, adds to the speed at which the oil turns black.
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
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1984 300SD 315k--daughter's car
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Old 09-12-2005, 03:57 PM
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When I had the 300CD, the oil would turn black after about 5 minutes of the engine running...
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Old 09-12-2005, 03:59 PM
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Mine will be black if I just drive around the block!!!
I bought the car from a dealer who insisted thay had changed the oil. But since the oil was black I did not believe them and changed it myself. The next day it was black again.
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Old 09-12-2005, 05:13 PM
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.. and the oil is doing exactly what it's supposed to: keep the soot in suspension until the big chonks can get filtered out.
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Old 09-12-2005, 06:37 PM
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Mine stays golden color as long as I drain out all the old oil and change filter and pour it in the engine. This is the dipstick reading tho. There would be little streaks of black in it sometimes. Turn on the engine and let it idle for a min or so and forget it. Black all over again.
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Old 09-12-2005, 07:14 PM
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seconds not miles

My Mobil 1 usually turns black after about 1000 minutes, not miles. Now, that is, 1000 minutes of driving, idleing, parked in garage. It must be really doing its job.

It doesn't take long.

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