Since you've not quoted anyone, I can't be sure if you're addressing me or someone else. Sounds like it might be me.
So, here's the situation: although I've owned the car for about 10 months, and have done a few changes, the changes have always been short intervals because it was questionable that the engine had good, reasonable scheduled oil changes. During that time, I've only taken one long trip of 400 miles. At no point during that period has the oil level dropped very far. In fact, I've only added 1/2 quart of oil in 4,700 miles.
When I leave on this upcoming trip, there will be approximately 1,400 miles since the last change. So far, the oil level is where it was on the day it was changed ...no observable drop in the level. I'm pleased and somewhat pleasantly surprised.
I have no idea what, if any, oil use will manifest during this trip. As I said in my original post, I may want or need to top up at some point.
I doubt very much that I'll do a UOA at the culmination of this trip, regardless of topping up. However, I may consider an analysis at the next change, when pretty much most all the residual oil that was in the sump when I bought the car has been flushed. The 2AR-FE engine retains about 1.5 quarts of residual oil at every change.
I hope this clarifies the situation. I will say one more thing: the "BS" Mobil1 EP seems to be doing a fine job and I'm happy with it.