For those who's 'that's snug enough torque wrench' is out of calibration, Ford recommends 13 lb/ft for spark plugs in 4.6/5.4 motors

 

Thanks loosebolt. I was going to ask the question if it was not in the owner's manual. After seeing all the posted threads about blowing spark plugs out and everything, I am going to check mine when I get back home with only 800 miles on the L.