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After 1,300 miles or so with the new PCV valve installed and 10w30 in the engine I'm back to using about 3/4 of a quart per 1000 miles. I'm hoping it was just a cheap/crappy no name PCV valve. Won't really know for sure until we take another long trip but at least it seems to have stabilized.
I just put mobile 1; 15000 mile oil in mine.....adding 1 quart every 1000 miles. Change filter every 5000 or so miles. At that point 5 quarts out of 7 have been replaced.
By 7000 miles I've had a complete oil change without any dry starts or oil to dispose of.
We just got back from a 4500 mile road trip. Added two quarts of Mobil 5w20 oil along the way, which seems like an alarming amount to me, but well within the normal range of what I read on here. Fresh motorcraft PCV was installed before the trup.