Web Reference: Apr 28, 2020 · Iridium plugs are only advantageous if they are of the double Iridium style. Double meaning the center electrode is Iridium and the ground strap is also tipped with Iridium. Jul 15, 2018 · What would be a reasonable Iridium Plug change interval? I have Denso Iridium Power II's, which Denso rated for 30k miles back in 2014 or so when I put them in. I rechecked and now Denso Europe gives them just 20k miles. I heard a lot of people claim 60-70k miles on them are no problem. Now the... May 10, 2015 · There is little I can find about Ruthenium spark plugs, except it's the new sliced bread, better, last longer, etc etc. If the Laser iridium have indeed only one iridium (or platinium + iridium) pointy electrode, I can see the Ruthenium lasting longer. So, what's your take ? Can you educate me on spark plugs ? On most 4 cylinder they are real easy to replace so I always them as a maintenance ...
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