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Iridium Spark Plugs 200 1983

posted by  guri r on  Wed Apr 11 00:05 CST 2012
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last visit: Thu May 8 22:46 CST 2014
[RELATED]

Thanks for your comments. I've never applied anti-sieze on plug threads, but do torque to specs. I saw iridium plugs as a special case after reading threads on Brickboard, so thought I should ask about the need to modify torque settings.

I don't have an opinion on whether using iridium plugs has a performance benefit. Costs are roughly the same for iridium and copper plugs when normalized to longevity of the plugs, using prices at fcpgroton: NGK iridium (BPR6EIX) for a 95 940T at $7.89 and 100K miles before needing changing and NGK copper (BPR6ES) at $2.29 and 30K miles. I imagine you can sway that relationship in either direction depending on where you buy the plugs, as prices vary, and condition of the car.






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