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Thread: which spark plugs should I buy

  1. #1
    subzero32 is offline Cadillac Owners Fanatic
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    which spark plugs should I buy

    Besides the OEM which plugs do you like?


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  3. #2
    repnatl is offline Cadillac Owners Enthusiast
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    Ngk iridium if they ever have them in stick always on back order. As a second source autolite iridiums work too never had an issue

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    subzero32 is offline Cadillac Owners Fanatic
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    Any key like Bosch iridium?

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    repnatl is offline Cadillac Owners Enthusiast
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    Hate Bosch I've seen too many of their electrodes fall apart in the cylinder but others like them just not my preference.

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    azblksrx is offline Cadillac Owners Member
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    Re: which spark plugs should I buy

    Replaced the oe AC 990 plats with Denso OEM long life iridium. Runs real smooth, and great throttle response. Advertised to last 120k miles or so.

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    What mileage is everyone swapping plugs at? I'm curious if I should take out the originals at 100km /60miles. V8

  8. #7
    subzero32 is offline Cadillac Owners Fanatic
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    Re: which spark plugs should I buy

    I am at 122,000 miles myself. I think I'm going to try Autolite Irridium. http://www.amazon.com/Autolite-XP526...1&s=automotive

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    glake89 is offline Cadillac Owners Connoisseur
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    Re: which spark plugs should I buy

    You're at 122K and want to change brands. What's wrong with OEM? Seems they did OK.
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  10. #9
    conedoctor is offline Cadillac Owners Connoisseur
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    Re: which spark plugs should I buy

    Ya I was going to say that as well, if I change plugs I will use OEM again.

  11. #10
    subzero32 is offline Cadillac Owners Fanatic
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    Re: which spark plugs should I buy

    Quote Originally Posted by glake89 View Post
    You're at 122K and want to change brands. What's wrong with OEM? Seems they did OK.
    I am not entirely sure the previous owner put in the OEM plugs. The OEM my local dealer said were ACdelco Platnum at about $10.00 each. I think I'll try some Autolite Irridium and save $30 difference.

  12. #11
    subzero32 is offline Cadillac Owners Fanatic
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    I stopped by autozone and ordered some NGK iridium plugs. Should do well i think.

  13. #12
    repnatl is offline Cadillac Owners Enthusiast
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    I changed to ngk when I bought it at 69k and changed them again at 89k and showed no signs of wear

  14. #13
    subzero32 is offline Cadillac Owners Fanatic
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    Re: which spark plugs should I buy

    Quote Originally Posted by repnatl View Post
    I changed to ngk when I bought it at 69k and changed them again at 89k and showed no signs of wear
    Thats good to hear. Now I just have to look up the torque specs for the plugs.

  15. #14
    conedoctor is offline Cadillac Owners Connoisseur
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    Re: which spark plugs should I buy

    So why the quick change?

  16. #15
    subzero32 is offline Cadillac Owners Fanatic
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    Re: which spark plugs should I buy

    Quote Originally Posted by conedoctor View Post
    So why the quick change?
    Autozone said they could get the NGK plugs I wanted in the very next day so that worked for me.

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