Finally saw Mobil 1 0W-16 at Walmart. The price was the usual $25.XX for a 5-qt jug. This was timely because my friend's 2018 Camry XSE 2.5L specifies 0W-16 and it was due for an oil change. As expected, the new Mobil 1 0W-16 poured "like water" but it probably is not much different at room temp than 0W-20. I did take a sample of the old oil (which was Toyota 0W-16 with 8,630 miles) and will be posting the UOA results once it becomes available.