why the spark plugs burn brown and not grey?
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Joined: Aug 2007
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From: Vacoas/phoenix, Mauritius
why the spark plugs burn brown and not grey?
Hi everyone,i have a civic with a d15z4 engine with light mods and i am wondering why the iridium spark plugs do not burn grey?
Last edited by baulum; Jan 5, 2010 at 11:48 PM. Reason: gramatical error
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Joined: Jan 2010
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From: Bucharest/RO
Re: why the spark plugs burn brown and not grey?
here's a guide on how to read spark plugs: http://www.ngksparkplugs.com/tech_su...qs/faqread.asp
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