Oil seems dirty right after a change

Discussion in 'General Motoring' started by Jeremy Marten, Dec 6, 2005.

  1. Hi there,

    I recently started doing oil changes myself on my 91 Honda Accord. I
    have noticed that each time I change the oil, it is dark and dirty right
    afterwards. I checked it again after running the car for 2 hours, it
    seemed lighter now, but not fully clean. Does this make sense? Is
    there anything I can do as a home beginner mechanic to fix this problem?
    I change Oil Filters every second change.

    Thanks in advance,

    Jeremy Marten
    Victoria, BC
    Jeremy Marten, Dec 6, 2005
  2. Jeremy Marten

    Big Al Guest

    How often do you change the oil?
    If you let it go too long the insides of the engine will be dirty along
    with a small amount of oil that always stays behind when you drain.
    This could contaminate the new oil making it look black.
    Maybe you could change it again after a day or so of use along with a
    new filter to flush it right out.
    Big Al, Dec 6, 2005
  3. Jeremy Marten

    Elle Guest

    Have you ever changed the PCV valve on this car? It bleeds
    off gases of combustion that accumulate in the crankcase
    (where the oil is) and routes them to the intake manifold,
    ultimately for "recycling," so to speak.

    A few years ago I found my 1991 Civic's PCV valve chock full
    of waxy buildup. My gas mileage was poor then, too.
    Replacing it greatly improved gas mileage and may have
    helped the oil, too.

    I think I'd consider changing the filter every oil change,
    particularly for Canadian driving.
    Elle, Dec 6, 2005
  4. Jeremy Marten

    bearman Guest

    Is the engine up to operating temperature before you drain the oil? Warm or
    hot oil holds a lot of contaminants that are drained out. Changing the
    filter every second time is a false economy. What does a Honda filter cost?
    $5? $6? Filters with an anti-drainback valve are holding a lot of dirty
    oil which mixes with the clean oil.
    bearman, Dec 6, 2005
  5. Excellent. I'll do a BigAl flush, look at the PCV valve and change the
    filter at every change (5000K)

    Thank you all for your input,

    Jeremy Marten, Dec 6, 2005
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