The NGK Iriduims are supposed to last a while, which I believe are standard from the factory. A lot of new cars can go 100k before a tune up, so the manual states. Obviously at some point my plugs were swapped for these Bosch. I got the car from Bonham TX with only 20 miles on it. Either they swapped them or someone else did when I had it in for service.

The only reason I pulled them was to go one step colder for the Nitrous or else I'd never known.