I should probably update...I did have the oil changed at 10K and used Mobil 1 5w20. I had brought my Wix filter to the dealer in case they didn't have the o-rings in stock. They did in fact have them, but got confused and used my Wix filter instead of a Ford one. They gave me a new Ford filter and large o-ring in compensation since the first oil change was comped anyway.

They also put all 5 quarts of oil in the sump, overfilling well above the fill line on the dipstick (excuse me, oil level indicator). So, I decided to put the Motorcraft filter in, figuring I'd drain off enough oil in the process to bring the fill level right to the upper mark. Worked out pretty well...and no signs of any oil consumption after about 3k miles.