cgmartine - I provided the link to the website that Consumer Affairs setup to collect complaints. Even if you count all the complaints listed, there are 100,000's of Fords that have not had a problem. It is something to be forewarned. I don't own a Ford, but I believe I would remove all the plugs on/around 100,000 miles and carefully install new ones. I would determine what is the recommended torque (not enough - they will unscrew and blow out or too much - would overstress the threads and weaken them so the plug would blow out).
It is my understanding that many of the Triton engines (maybe all of them) have an electronic coil that attaches to the plug. A blown plug for any reason probably damages the coil thus adding to the cost.
The smarter part of me would take the vehicle to the dealer and have them swap the plugs and hang on to the receipt. That way if one of the plugs they replaced blows out, they could replace it at their cost.
