Also, I only use WIX filters these days. They're only a bit more expensive, but they're quite possibly the best from the limited research I've done. But, I carry cheapo Fram filters (or whatever is on sale) as spares for instances like this:

Mobile 1 5w-30 high mileage (not full synth) for me too. burning about a quart of oil every 2000 miles or so it seams.
Scott, it could be your rings too. I wonder if a compression or leak down tests might help reveal if something is going on?
Even with my re-freshening of the engine with new valve seals, head gasket and overall inspection of the engine, I still burn a bit of oil. Probably the same rate. We just returned from a 3400 mile trip where I burned one whole quart of crappy Batozone oil within about 1000 miles and then another quart of rotella in 2400 miles. It's burning more oil than I'd like but I keep an eye on it.
I recently replaced the oil pressure switch in mine. Its located on the or near the flange of the oil filter. Replace it when you change the oil next.
Also, white smoke/steam is usually head gasket or fuel related, although the latter is usually light gray... If its bluish gray, that's oil. That'll be the valve seals... Or worse.
Switched to Shell Rotella T6 5W-40 on this last oil change; engine seems to really enjoy it, runs smoother and quieter than before.