Just wanted to report back in case it helps others...
I finally got around to looking at the PCV valve. Wanted to give it one more Oil change and observe the consumption before I start tinkering around.
~5K miles on the oil, I have about half a quart of oil consumption (the level dropped from the high mark to half way between the high and low marks on the dip stick). While this level of oil consumption is not too concerning and will be completely acceptable to many, this van has never had any consumption at all over OLM oil changes.
Another observation was that the oil started getting darker by around 2K and is now quite dirty although it is not burnt!
Took the PCV valve out and it was not gummed up but dirty! I could hear the rattle but only intermittently. The new one was much more rattly. I still want to give this oil fill about 1K miles and want to do a fuel line cleanup, so instead of replacing the PCV valve at this time, I decided to clean the current one up with a brake parts cleaner. I removed the O-rings first (the larger one was good, the smaller one seemed to be much more compressed) and then cleaned up the valve body using the spray. Initially the spray cleaned up the lose oil, but a few sprays later I could see solid particulate debris on the paper towel.
After letting the valve body dry, I put the O-rings back on and oiled them up. The cleaned valve was just as (or maybe a bit more) rattly as the new one now and is back on the van now for the next 1K miles.
I intend to do a few long drives to heat up the oil and let it's finish its cleanup job after the previous extended drain and let the techron concentrate do its work. I will then replace the valve, oil and filter and hopefully that should take care of the minimal oil consumption that the van currently experiences.
