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I removed the oil filler cap and there was a cream substance around cap.what can cause this?

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  • Steve Harris
    Steve Harris Apr 09, 2015

    Hi peter lancett, I want to help you with your question, but I need more information from you. Can you please add details in the comment box? what type of car do you have?

  • peter lancett
    peter lancett Apr 09, 2015

    2010 peugoet 207 1.4..when i took the oil filler cap off there was alot of cream around cap..checked water no oil in it..been told it might be just condensation as i only do short trips to work



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Hello Peter, Milky looking oil can be caused by water getting into the crankcase . You could have a leak in an engine oil cooler, a transmission oil cooler, a power steering oil cooler, or a crack in an intake manifold gasket, head gasket, or a cracked head. If it has been a long time since the oil and oil filter has been changed, it could be as simple as condensation forming in the crankcase.

Posted on Apr 09, 2015

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Moisture builds up after the engine cools down and mixes with oil residue. This is an emulsion of oil and water that is common in areas that have large temperature variations. If you're in a hot climate this should not happen unless you're getting water into the oil. I would change the oil, heat it up completely then change it again while it's at it's hottest. Not fun but comparatively cheaper than a new engine by far. Probably nothing to worry about if you live in large variations of temperature. Wipe it out with carb cleaner & make sure your air filter is clean.

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