5.4 broken plug

I had a 3V with the same spark plug design before going to the 572, and never had that problem as I pulled the plugs often. It seems like this was always a problem though when one was pulling the plugs for the first time after 60K miles or whatever. One thing is for sure, simply put anti seize on the body of the plug (below the threads) but obviously not anywhere on the ground strap or the insulator nose---and you won't have the problem again.