hi i wanna know if these r good for corolla altis 1.8 2010? (1zzfe)
Denso K16R-U11 in copper and Denso Ik16 in irridium?if not kindly mention the right plugs for it ..
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Both plugs work, only difference is your spark plug change interval increases due to long life of iridium plugs
Both are almost same spark plug only difference is ik16 will last very very long
i have altis 1.8 2010 model janven plugs when i change 1st time that was in coper denso k16r-u11
As far as I have read on international forums, copper plugs provide more efficiency to engine in terms of power and fuel economy, but iridiums lasts way longer then copper.