How long does it take for new oil to get dirty?

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Old 09-17-2012, 12:16 PM
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How long does it take for new oil to get dirty?

After changing Engine Oil, how long does it take for the oil to turn black (dirty)?
Old 09-17-2012, 12:22 PM
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How "dirty"? Oil will turn significantly darker within 100 miles of driving.
Old 09-17-2012, 12:22 PM
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Old 09-17-2012, 12:37 PM
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The oil doesn't turn dark because it's "dirty". It changes colors due to the chemicals breaking down and what-not.
Old 09-17-2012, 12:39 PM
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i thought it gets dark due to holding combustion by products in suspension. It's a sign that the detergent in the oil is working as it should.

hypothetically, having "clean" oil after 1000 miles is not a good sign.
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