I spent a good 2 hours messing with an o2 sensor today, I tried everything I had... PB blaster, torch, hammer... The nut is worse for my attempt but I stopped. You think a Ford dealership would be willing to loosen them up for me, or do you think they wont touch it unless I have them replaced there? I'd call them but they aren't open today. I don't really want to take it to a local shop, I trust them less than Ford.