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Message: <blockquote data-quote="13btt" data-source="post: 740908" data-attributes="member: 3125">Where does each owner buy their sparkplugs from? How much do you pay? Or perhaps your mechanic replaces & charges you for them? Never let a 'monkey mechanic' put in standard (i.e. non-rotary) plugs as that is the end of your engine as happen to one unfortunate owner about a year back!@ The apex of the rotor crashes into the head of the plug which protrudes through the hole in the rotor housing...bang!I only use NGK BUR8EQ and BUR9EQ in my engine with excellent results as I find using 8 rating lasts longer than 7 rating for a moderately modified engine and provides better power & smoothness.I have seen very poor idling / difficulty starting & flooding of engine from people using racing 10 & 11 plugs of NGK or HKS brand.In case anyone is confused...the higher the number the colder the plug is = it retains less combustion heat which is bad for street engines as they do not provide clean burn & get excessive carbon build up causing further fouling.Standard oem Mazda issue are BUR7EQ and BUR9EQ or with a P at the end for platinum plugs - IMO platinum are a waste of money as they perform slightly worse and don't last any longer whatsoever - in case anyone was wondering on this!</blockquote>

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