I changed the plugs in my 4.2 V6 about 6 months ago. Cost me a little over a couple of bucks per plug....had to spend a little over 15 bucks. Gee, was I mad.
"Never argue with an idiot; they'll only drag you down to their level, then beat you with experience"
2007 F150 STX Supercab (4.6 2V V8), Edge tuner, factory navigation, H-D headlights, Mark VIII electric fan conversion with flex-o-lite controller.