I have about 2,000km on each oil. I ran ZIC X7 FE 0W-30 for 8,000km in Karachi winter before that in my Civic - no consumption, jet black oil drain. However, I don't think I'll buy Mobil1 5W-30 again. HTHS is 3, so it's ACEA A5/B5, and TBN is 9.2, which is good, but there are cheaper oils with equivalent or slightly better specs. I paid 12.5k for 4L.
Mobil1 FS X2 5W-50 went very dark in my Jimny within 1,000km. TBN is 12.5 for FS X2 5W-50, HTHS is 4.3. I'll use it for as long as I feel comfortable then switch to something else. I'm confident this oil can at least make it through the entire Karachi summer without shearing, and I have a constant eye on the oil pressure. So far, all good. You can't get more TBN, but you can get the same or more HTHS for about the same money. I paid 12.5k for 4L. The engine takes 3L, and the oil regularly runs at 100°C.