Spark plugs-replacement 98 41-921 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-25-2006, 05:03 PM   #1
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Default Spark plugs-replacement 98 41-921

My 98 came with 41-401 plugs which were replaced after a few years with 41-921 plugs. These were platinum and were good for 100000 miles. After 75K I'm replacing them with???

I find the replacements aren't available: the replacemetns are iridium @ $6 per and the number is 41-101. What happened to reasonable priced standard spark plugs? I dont want to change brands but this is a problem because I can't see 100K plugs in a car at 135K miles.

Can someone tell me what happened?
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Old 06-25-2006, 05:10 PM   #2
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just go with some copper plugs then.
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Old 06-26-2006, 10:25 AM   #3
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The Iridums are a good replacement and the car could make another 100K in reality.

However maybe trying another place or a dealer will get you the results you seek.
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Old 06-26-2006, 01:12 PM   #4
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Default Re: Spark plugs-replacement 98 41-921

Quote:
Originally Posted by imidazol
My 98 came with 41-401 plugs which were replaced after a few years with 41-921 plugs. These were platinum and were good for 100000 miles. After 75K I'm replacing them with???

I find the replacements aren't available: the replacemetns are iridium @ $6 per and the number is 41-101. What happened to reasonable priced standard spark plugs? I dont want to change brands but this is a problem because I can't see 100K plugs in a car at 135K miles.

Can someone tell me what happened?
Eh, it'* designed to run with the irridiums. You could go copper, but why? You can typically find the irrids for about 4 or 5 per if you look around, and you'll never have to replace them again. I did mine when my engine was around 120k, and the original plugs were still just fine... the only reason I replaced them is because I didn't feel like returning spark plugs...
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