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Thread: Popular choice for spark plugs in my 99 STS???

  1. #1
    Join Date
    Mar 2005
    Location
    NY
    Posts
    125

    Popular choice for spark plugs in my 99 STS???

    well its about time to change my factory spark plugs in my 99 N*...what seems to be the popular choice that everyone goes with now over the factory stock ones....
    any better AC-Delco ones?
    thanks.


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  3. #2
    mcowden is offline Cadillac Owners Connoisseur
    Join Date
    Jun 2003
    Posts
    1,164

    Re: Popular choice for spark plugs in my 99 STS???

    Quote Originally Posted by 1fastSTS
    well its about time to change my factory spark plugs in my 99 N*...what seems to be the popular choice that everyone goes with now over the factory stock ones....
    any better AC-Delco ones?
    thanks.
    AC Delco 41-950s are spec'd for your car. They are double-platinum and the engine was tested using those plugs, so I would definitely recommend sticking with those. If you want to try something different, NGK double platinums, Autolite double platinums, or AC Delco Iridium plugs might be OK choices, but I don't know if the heat ranges for any of those other plugs will match up with what the engine requires. You can put whatever you want in there and they will probably work, but it's a question of how well will they work and for how long. For the sake of saving time and money, it would be my choice to stick with the 41-950s.
    Mike

  4. #3
    Join Date
    Sep 2003
    Location
    Hermosa Beach, CA
    Posts
    2,721

    Re: Popular choice for spark plugs in my 99 STS???

    stick with ac delcos
    do a search on this forum, plenty of good reasons to stick with oem.....if you want reliable problem free time


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