spark plugs - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 12-13-2014, 11:15 AM Thread Starter
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spark plugs


I am tuning up my 1981 380SL and I was told to never use copper that correct?
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post #2 of 4 (permalink) Old 12-13-2014, 01:22 PM
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Sounds like a personal preference. I'd be curious to see scientific evidence one way or the other.
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post #3 of 4 (permalink) Old 12-13-2014, 06:36 PM
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don't you remember high school science class? copper is a very conductive metal, more than platinum and iridium. then again, I didn't do well in science class, so don't listen to me lol
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post #4 of 4 (permalink) Old 12-14-2014, 07:25 AM
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this is not thru , use the copper plug , they belong to those cars . use w8dc or w9dc .
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