Review on Denso FK16HQR11 Iridium Long Life Spark by Jesse Bailey

Denso FK16HQR11 looks worn at 62K. It's ok but they were on our used Sonata and I think they were under 20k because the peaks were perfect and measured around 0.040. I'm afraid of burn marks on the insulator and burn blisters. I try to attach pictures. One candle was ok, 2 burned out, one burned poorly and bubbled.[,,,]