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Discussion Starter · #1 ·
Just noticed this sticker in the engine compartment, pointing out that you should not replace the IS300's Iridium spark plugs with anything but.

So what's the deal with Iridium plugs? I thought Platinum was the hot ticket. Am I right to assume they will cost like unobtanium?
 

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Yeah.. pretty much.. so far, only Nippodenso makes them (that I know of).. retail price is around $25/piece.. my friends that have used them for drag racing purposes swear by them.. I didn't know the IS had iridium plugs.. thats cool..

Also, Platinum plugs suck.. the only appeal to platinum is its longevity.. for performance applications, its still better to go with a conventional spark plug.. but iridium is the best..

unobtanium.. good one
 
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