I have Iridium spark plugs installed on my Nissan Sentra. Is that bad?
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2006 Nissan Sentra Question: Iridium Spark Plugs Installed: Is it bad?
Answer #1patrick mannion from Greg Solow's Engine Room, September 21, 2009, 19:47Master
Iridium spark plugs are the best plug made. many auto technicians do not like Bosch Platinum or the four prong Bosch plugs in Asian cars. The spark plugs you have if they are the right application for your car are the best and should not require changing as frequently as a standard plug.