Plugs in my Ford hit 88k, and they're rated to go 100k but I figured I would swap them out as I'm doing some routine stuff ahead of schedule (don't trust that 150k transmission oil service interval). Anyway, the iridium plugs with 88k didn't look all that bad. Perhaps they really do last as advertised.
I did use anti-seize on the new ones. I'll thank myself in 8 years.
I did use anti-seize on the new ones. I'll thank myself in 8 years.