So just reviving this to update.
I just changed the oil in the truck today. Original fill was Valvoline Next gen 5w-20 (3 qts) and Pennzoil Platinum 5w-20 (3 qts) with a Carquest filter.
I went to 3,400 miles this time before I changed it, not because of miles, but it had been over 7 months since the last change.
With the short tripping I do, that was longer than I wanted it in there.
I was planning to go to 4,500 miles, but I am just not driving far enough.
Late last year, I drained the oil from the Scion into an empty, clean Valvoline Nextgen bottle. Just under 5000 miles on the oil.
I got about 3.5 qts of usable oil from that (some left in the filter, a little drained before and after).
I did use 1.5 qts of the PP² (my nickname for Pennzoil Platinum on its second use) during the oil change.
I added 1/2 qt at 1100 miles in, then another qt @ 2,400 miles. It was getting close needing to add another qt so I could try for 4500 miles, but just could not make myself wait, at the rate I drive now it will be another 2 months.
Sure I should do a UOA on this to see how it did, but I am not that interested in how it does, just so long a it does something, which it seems to be doing.
PP² may not be for everyone, but for me I think this will work for my current needs for a while. I still have 2 qts of PP² in my stash for this OCI, and will have another oil change due on the Scion before I use all of that (although the Scion currently had some Auto Zone 0w-20 syn in it right now).