Scott Gordon Posted July 31, 2007 Share Posted July 31, 2007 Hi , I would like to replace my spark plugs on my 1998 sc300 and would like to know what the OEM plug was it seems folks refer to the oem plug but don't name it? Also from what I have read should I replace the plugs in the car with with an Iridium plug or should I use platnum ? finaly from what I've read I should use either Denso or NKG is one better then the other it seems NKG are a bit cheaper? thanks Scott Quote Link to comment Share on other sites More sharing options...
jzz30 Posted August 1, 2007 Share Posted August 1, 2007 stock plugs are denso platinums. Quote Link to comment Share on other sites More sharing options...
UCF3 Posted August 1, 2007 Share Posted August 1, 2007 I've used both, but the Denso's produced a higher spark compared the NKS. Also, 88-today toyota engines use Denso's so I'd stick with that. Quote Link to comment Share on other sites More sharing options...
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