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V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, Synthetic Oil For Cts 3.6l in Cadillac Engine Technical Discussion; How did you figure out it was the wrong oil? By the color?...
  1. #16
    greyghost04's Avatar
    greyghost04 is offline Cadillac Owners Connoisseur
    Automobile(s): '14 CTS 2.0 Luxury AWD, '14 SRX 3.6 AWD
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    Re: Synthetic Oil For Cts 3.6l

    How did you figure out it was the wrong oil? By the color?

  2. #17
    strindl is offline Cadillac Owners Fanatic
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    Re: Synthetic Oil For Cts 3.6l

    Quote Originally Posted by greyghost04
    How did you figure out it was the wrong oil? By the color?
    When I took the car in..I mentioned to the service writer to make sure they used Mobil one..he stated that they didn't use Mobil one, but used a Citgo Product . I just assumed, being a dealer, that they knew what they were doing. I checked with multiple sources for Citgo Lubricants, including Citgo itself, and can't find anyone who has heard of citgo even offering a full synthetic oil that meets the GM4718M spec.

    It turned out well...I took it to an oil change place near my house that I have been using for years, and who I trust, and explained the situation to them. They drained out the Citgo Oil, put in a new oil filter, and put in the Mobil One that I had brought with me. They told me .."no charge". That was a pleasent surprise

  3. #18
    c5 rv's Avatar
    c5 rv is offline Cadillac Owners Connoisseur
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    Re: Synthetic Oil For Cts 3.6l

    ...and the name and location of this nice oil change place??

  4. #19
    strindl is offline Cadillac Owners Fanatic
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    Re: Synthetic Oil For Cts 3.6l

    Quote Originally Posted by c5 rv
    ...and the name and location of this nice oil change place??
    Valvoline Instant Oil Change...sunset drive in Waukesha, Wisconsin.

  5. #20
    b4z
    b4z is offline Cadillac Owners Connoisseur
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    Re: Synthetic Oil For Cts 3.6l

    Valvoline is an excellent company.
    My '87 IROC will run to 229 degrees before the 2nd electic fan comes on.
    Valvoline is the ONLY oil that i have used that will last a couple of thousand miles before the oil pressure stops dropping.
    My IROC has 205,000 miles on it and I use Valvoline HD Racing 20W-50.
    I am sure their synthetic product must be good also.

  6. #21
    strindl is offline Cadillac Owners Fanatic
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    Re: Synthetic Oil For Cts 3.6l

    Quote Originally Posted by b4z
    Valvoline is an excellent company.

    I am sure their synthetic product must be good also.
    Valvoline does offer a synthetic that meets the GM spec for the CTS engine. I havn't tried it yet, but I would feel very comfortable with that in my CTS's engine.

  7. #22
    billsCTS is offline Cadillac Owners Member
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    Re: Synthetic Oil For Cts 3.6l

    The dealer in Raleigh charges $74.95 for an oil change using Mobile 1. $16 for labor, $9.55 for the filter element (seems low to me) and the remainder for the oil, $49.40. On a normally driven car, it will go ~10,000 miles between oil changes. This seems about right for a full synthetic. The stuff just does not break down, it just gets dirty!

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