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Thread: Mobile One oil with 3000 miles on it has little dark globs..........

  1. #1
    New Member
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    Nov 2011
    marin ca
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    A friends 1993

    Default Mobile One oil with 3000 miles on it has little dark globs..........

    This is a friends 93 V8- I think the 300 hp one and I checked dipstick (cold) and noticed clean looking oil with a little dark glob towards lower 1/3 of dipstick.
    So in again and same thing...been looking at oil on dipsticks 40 yrs now and never seen this.

    After a 50 mile run same day, I checked it again hot and sure enough...every time it has little tiny bits of something suspended in oil (always in bottom part of dipstick)
    any ideas? cars owner not worried... hey they run hot....
    but I think maybe some gasket material? why is the oil filter not getting this?
    oh yeah 123,000 miles and always has had mobile one oil.
    ps idles real rough - tailpipe inside is very dark black sooty smells like she runs rich and hot.
    what a fun car to drive! its a convertible - its got me thinkn bout buyn a cheby

  2. #2
    Mobile One oil with 3000 miles on it has little dark globs.......... 6 Shooter's Avatar
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    May 2002
    Missoura Ozarks
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    Millennium Yellow LS6 enhanced Roadster


    Sounds like a coolant leak to me...

  3. #3
    Mobile One oil with 3000 miles on it has little dark globs.......... vett boy's Avatar
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    Feb 2005
    NH ,ME,FL,MS
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    2008 vert 6M silver


    It's water /coolant from as 6 shooter said or condensation .

  4. #4
    Member Roc's Avatar
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    Mar 2005
    Bowling Green, KY
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    2002 coupe, 2006 Z06


    with running rough makes me think head gasket is going
    "Leave later, drive faster, get there first"

  5. #5
    Member dougelam's Avatar
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    Jul 2011
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    2002 Roadster


    I would be willing to bet it is something in the dipstick tube getting picked up when the stick is pulled out

    2002 W/Borla Exhaust

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