Oil burn
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Cadillac STS Forum - 2005 through 2012 Discussion, Oil burn in Past Cadillac Vehicle Discussion; I have a 2005 STS v6 with 66,000 miles, it started using a quart of oil every 2,000 miles. Anyone ...
  1. #1
    Harley04 is offline Cadillac Owners Member
    Automobile(s): 2005 STS
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    Oil burn

    I have a 2005 STS v6 with 66,000 miles, it started using a quart of oil every 2,000 miles. Anyone else have this issue?

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  3. #2
    KRSTS is offline Cadillac Owners Enthusiast
    Automobile(s): Crystal Red 2008 3.6 DI RWD
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    Re: Oil burn

    according to GM that's within normal range for that engine

  4. #3
    Harley04 is offline Cadillac Owners Member
    Automobile(s): 2005 STS
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    Thread Starter

    Re: Oil burn

    That can get expensive, $70 for oil change and $9 a quart to add in between changes!!

  5. #4
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
    Automobile(s): White Diamond 06 STS V8 RWD 1SF F55 HUD/ACC NAV - 135k
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    I paid $56 for a 6qt. Mobil 1 oil change at my local GM dealer for my 3.6l CTS...OP, how does your intake look? Full of oil? It's the "PCV" orifice on the passenger side valve cover...gets plugged up and then oil gets sucked into the intake...have you looked into an oil catch can? This is why the 3.6l engines like to blow timing chains...GM design flaw.
    Past Cadillac's

    2004 CTS 3.6L - 2011-2012
    2001 Seville Touring Sedan - 2006-2011
    1995 Seville Touring Sedan - 2005-2006

  6. #5
    Harley04 is offline Cadillac Owners Member
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    Thread Starter

    Re: Oil burn

    Thanks for the info, I'll check that out.

  7. #6
    dannyquest is offline Cadillac Owners Fanatic
    Automobile(s): 06 STS 99,000 miles
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    Re: Oil burn

    Harley04, Here the scoop. My 06 STS V-6 was burning oil at rate of 1qt. @ 760 miles. Lucky it was under warrenty. Cadillac replaced the piston rings. Now 30,000 miles later still burns no oil. You could add 1 qt. of oil every 2,000 miles and never have to change oil again. Danny

  8. #7
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
    Automobile(s): 2006 STS4 V8 1SG & 2007 STS V8 1SE
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    Re: Oil burn

    ^^^ Not so. Oil breaks down & gets dirty. Do what the OLM says.

  9. #8
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
    Automobile(s): White Diamond 06 STS V8 RWD 1SF F55 HUD/ACC NAV - 135k
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    I do no more than 5k between changes, no matter what the OLM says.
    Past Cadillac's

    2004 CTS 3.6L - 2011-2012
    2001 Seville Touring Sedan - 2006-2011
    1995 Seville Touring Sedan - 2005-2006

  10. #9
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: Oil burn

    That's a waste of oil, but it's your money. Enjoy!

  11. #10
    Harley04 is offline Cadillac Owners Member
    Automobile(s): 2005 STS
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    Thread Starter

    Re: Oil burn

    Any recommendations for a brand of oil catch can?

  12. #11
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
    Automobile(s): White Diamond 06 STS V8 RWD 1SF F55 HUD/ACC NAV - 135k
    Join Date
    Jul 2005
    Location
    Burnsville, MN
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    Was there oil in your intake? The catch can doesn't keep the oil in the crank case, just keeps it from going into the intake. Poke around the 1st gen CTS forum regarding this, TONS of info...
    Past Cadillac's

    2004 CTS 3.6L - 2011-2012
    2001 Seville Touring Sedan - 2006-2011
    1995 Seville Touring Sedan - 2005-2006

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