Originally Posted by
bismic
Andy - thanks for the comments. The procedure is definitely to fill to the full point (NOT OVERFULL). As Nitrogen states, it takes time to fully drain the oil back into the pan after operation (Ford states 20 minutes). Because of this, it would be wise to add 13.5 or 14 quarts at first - if you do not know your truck. Then you can add whatever it takes to get to the full mark. After that, just add the amount you have determined is necessary to fill your system.
Ford indeed says you do not have to add until your level drops to minimum, but you really should not start out there.
Intersting. The 13.5 was to account for the 1.5 qts in the HPOP that do not drain. So to me, as I am understanding, see that adding 15 qts would in fact put you overfull...13.5 and Min would actually work out to be the proper amount. Please clarify :-)