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 Connoisseur
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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
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    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 Cadillac Owners Master
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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.

  6. #5
    Harley04 is offline Cadillac Owners Member
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    Re: Oil burn

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

  7. #6
    dannyquest is offline Cadillac Owners Fanatic
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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
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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 Cadillac Owners Master
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    I do no more than 5k between changes, no matter what the OLM says.

  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
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    Re: Oil burn

    Any recommendations for a brand of oil catch can?

  12. #11
    curtc's Avatar
    curtc is offline Cadillac Owners Master
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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...

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