+/- 1/2 qt will not make any difference to the engine. It does not know the difference.. IMO, I think it's worse to be over filled then even being a qt low...
Pretty sure all the Triton engines basically call for 6 qts, even the V10.
The dip sticks have a MIN to MAX range. As long as it's in the middle, you are going to be fine.. Go over MAX and that's overfilled and, well, do what you want at that point... :)
I also don't follow the "10k" mile oil change interval.. I do 1/2 that and change at no more than 5k miles.
Remember, YMMV, so follow whatever works for you!
Mitch