I replaced the factory champions with Bosch Platinums yesterday. Would have preferred NGK Platinums, but all they had were the $10 plugs, so I went with the $2.50 Bosch.
3 reasons why I am GLAD I did this.
1. Champion plugs are against my religion
2. The factory does NOT use any kind of anti-seize, and the plugs came out so dry that I had to go very slow for fear of heating up the aluminum threads in the block and damaging them.
3. The stock plugs were suprisingly worn at 9500 miles, and diddnt look too great. In fact they had a greenish residue on them...... Gaps were big, but at least consistent at .46
As per my ritual, each new sparkplug received the silver antiseize on the threads, was torqued to 2lbs, and dielectric grease on the cap. I also put a dab of the grease on the coil connectors.
Suprisingly, when I started the Commander up, it threw a check engine light..... I'm thinking great..... Engine was smooth, no missing, but something was up. So I disconnected the battery and reset the computer by holding the key on start for 30 seconds. **THIS IS THE RIGHT/FAST WAY TO DO THIS, NO reason to have to wait 30 minutes as some say. Restarted and no CEL. Drove about 60 miles last night, no real difference in feel, other than a bit smoother feel to the motor (psycho somatic) Fuel mileage seems to be 1-2 better highway, and 3 city, but will weigh in after a full week.