Considering changing my spark plug at 10,000 km. Heard that iridium plugs from Denso are good. TRD spark plugs are also from Denso, albeit at 3 times the price...
According to TRD..
High-output, high-rev sports car engines require a spark plug that is able to withstand the loads generated by such high power, and that can guarantee reliable ignition. TRD employs a new iridium alloy as the precious metal for the center electrode, to achieve a super-fine tip diameter of 0.4 mm, compared to platinum's 0.7-mm diameter. This greatly improves ignitability over platinum by decreasing the voltage required to spark, and allows you to maximize the response of high-performance engines.
Tempting indeed. So for Toyota Wish, we will need the IK-16 four piece set. Seems like it's a discontinued items too... strange..
Anyway, we'll see.
Cheers,
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