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Thread: What weight and type oil to use?

  1. #1
    jh225 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Jun 2007

    What weight and type oil to use?

    I know it has probably been discussed a million times, but when I tried to search, I came up empty.

    98 Deville, 60K miles. It was serviced regulary by a dealer, but I don't know what type of oil they used. I would be willing to bet it wasn't synthetic, but don't know if it was 5W30, 10W30, 15W40, etc.

    I also need to know if these engines require just an "API" rating or the API with energy conserving values such as Penzoil. I have always used Penzoil in my cars, but never had a N*

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  3. #2
    EcSTSatic's Avatar
    EcSTSatic is offline Cadillac Owners Master
    Automobile(s): 1999 STS - diamond white
    Join Date
    Dec 2004
    Wichita, KS

    Re: What weight and type oil to use?

    It has been discussed a million times. How could you possibly come up empty?? Read your manual!

  4. #3
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS - 66500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: What weight and type oil to use?

    More than a million times in these your owner's manual. FWIW, I use Pennzoil Platinum 5W-30 synthetic and WIX 51522 filters. Uses a quart every 3,500 miles. 60Kmi is nothing to a N*. Run the hell out of it.

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: What weight and type oil to use?

    Factory recommends 10W30 conventional. Whatever brand tickles your fancy. There have been more oil wars fought here than I care to remember. Search again. You MUST be doing something wrong. You should find so much to read that you will never finish it.

  6. #5
    urbanski is offline Cadillac Owners 10000+ Posts
    Automobile(s): 05 CTS-V
    Join Date
    Mar 2003
    San 'tone, TX

    Re: What weight and type oil to use?

    lock er up ranger

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