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Thread: Can i use synthetic oil in northstar?

  1. #1
    KingRamses is offline Cadillac Owners Member
    Automobile(s): 2003 Cadillac Seville STS
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    Can i use synthetic oil in northstar?

    I have a 2003 STS with a northstar engine, i wanna know if i can use synthetic oil inside this engine. And what is the best oil than i can use for this engine?

    Thanks!


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  3. #2
    EcSTSatic's Avatar
    EcSTSatic is offline Cadillac Owners Master
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    Re: Can i use synthetic oil in northstar?

    Read you owners manual and follow the recommendations. That's really all you need to know.

    Or you could do a search and read the volumes of opinions!

  4. #3
    Cadillacboy's Avatar
    Cadillacboy is offline Cadillac Owners Connoisseur
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    Re: Can i use synthetic oil in northstar?

    Steve Steve Steve


    opppsssss what would we say ? Oh yeah amsoil amsoil amsoil


  5. #4
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Can i use synthetic oil in northstar?

    Your owner's manual recommends 5W-30 oil for everything other than HOT climates. Mobil 1, Pennzoil Platinum, Royal Purple, whatever floats your boat in a name-brand oil.

    I use exclusively Pennzoil Platinum 5W-30 and a WIX 51522 filter, change oil every 6000 - 8000 miles and get about 3,500 miles to the quart; town, country, highway, crazy driving. Look down into the chaincase with a flashlight, through the oil fill cap, and it's absolutely new-metal clean.

    Read the oil article up ^^ there in the archives/technical. You have reopened Pandora's Box.

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Can i use synthetic oil in northstar?

    Quote Originally Posted by Cadillacboy View Post
    Steve Steve Steve


    opppsssss what would we say ? Oh yeah amsoil amsoil amsoil


  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Can i use synthetic oil in northstar?

    Quote Originally Posted by KingRamses View Post
    I have a 2003 STS with a northstar engine, i wanna know if i can use synthetic oil inside this engine. And what is the best oil than i can use for this engine?

    Thanks!

    Pleeeease do a search.
    Yes, you can use synthetic. You can use any oil that you want.

  8. #7
    urbanski is offline Cadillac Owners 10000+ Posts
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    Re: Can i use synthetic oil in northstar?

    no need for another one of these, right Ranger?

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  9. #8
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Can i use synthetic oil in northstar?

    Amen! I had thought about locking it.


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