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Engine Oil

Hi,

Is it normal for a new engine oil to become really black (and I mean black!) after 4,000km? Oil filter was also replaced at the same time.

If not, what could be the likely cause?

Thanks.

Al

1995 Subaru LX
Reply to
al
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Depends on how black. Color is often a poor means of determining what shape the oil is in. If you're really concerned, get a sample analyzed.

There is no single "likely cause". I could imagine the following:

  • Additives break down. * Dusty conditions. * Worn rings. * Fuel contamination. * Air filter seal compromised or a leak somewhere letting in unfiltered air.
Reply to
y_p_w

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