One thing I noticed is that arc / spark never start at the "center" flat area of the center electrode of the normal style center / side electrode plugs (not those split fire style side electrode plugs). They always start at the sharp edges of the center electrode, and the material always wear out from that edges and round it out. As the edges round out, the ignition butt dyno doesn't feel as strong as before.
So I suspect those V power plugs from NGK merely trade usage life for the earlier life performance (reducing misfire probability).
I also noticed that the more precious the material of the plug tip, the finer the center electrode and that's where the "performance" come from, not the material but the tip diameter.
So I suspect those V power plugs from NGK merely trade usage life for the earlier life performance (reducing misfire probability).
I also noticed that the more precious the material of the plug tip, the finer the center electrode and that's where the "performance" come from, not the material but the tip diameter.