Thanks for the reply celly. I'm just tryin to figure out what all the recommended brands and parts are for the Explorer as I just bought it and have previously been into Japanese cars, so its a pretty different ball game.
I used to change my plugs twice a year in my cars but after seeing how hard it was to do the plugs on the X last night i'm not sure if I want to do it that often haha. That back plug passenger side was pretty gnarly to get at. Even with taking the wheel well splash shield off.