I think he was talking about the A25A engine - either he was wrong or misspoke unfortunately. It happens…
I saw this topic came up again recently. I recall a long thread last year that I thought put this to bed. But I guess not. The electronic oil pump speculation appears to be based on a video by the Car Care Nut saying the oil pump was electronic and calibrated for 0w-16. This being the reason for...
bobistheoilguy.com
Use 16 or 20 - whatever.
By way of example: PP 0W16 @100 cSt 7.1 and M1 ESP 0W20 @100cSt 7.9.
https://www.shell-livedocs.com/data/published/en-US/126583ca-eb28-4530-8bd6-067e647a43af.pdf
Discover how Mobil 1™ ESP X2 0W-20 advanced synthetic motor oil can prolong the efficiency of emission systems in diesel and gasoline powered automobiles.
www.mobil.com
Both are 0W and within J300 range for 16 and 20 so they are quite literally interchangeable as far the engine is concerned with respect to viscosity. Doesn’t matter what hoops people try to jump through to make their ECU or pump theories work. It just doesn’t make sense. There is just no way that small of a deviation will make a difference.