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Old 05-05-2010, 11:08 AM   #1
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Oil looks black as night! normal?

Checked my oil level via dipstick yesterday. Oil and filters were changed exactly 9 months & 1,100 miles ago. Bus runs great and level looked good... just AMAZED how black it looked. Is this normal?

Engine = Caterpillar 3176 turbo (325 hp)

Oil pressure when warm @ speed approx. 43 lbs.

Oil analysis resulted positive (green check mark) all normal. (at time of oil change)

I'm kind of new to diesel engines but LOVE them!

When I change the oil in my nissan gas burner for months afterwards the oil still looks clean. I am dealing with a COMPLETELY different animal here aren't i?
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Old 05-05-2010, 11:19 AM   #2
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Black is normal. A diesel's oil will turn black after a short time.
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Old 05-05-2010, 11:29 AM   #3
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Black is good. It means the oil is removing contaminants.
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Old 05-05-2010, 11:43 AM   #4
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If you just change the oil, start it and let it run 10 minutes it will be just as black. This is normal for a diesel.
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Old 05-05-2010, 12:18 PM   #5
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Yay, now I don't have to ask the question!

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Old 05-05-2010, 03:12 PM   #6
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Thanks guys! I'm learning stuff every day. I LOVE THE BIG IRON DIESELS!
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