Interesting thank you. I did not know this. I had recently changed my thinking that perhaps the Dexos add pack that is magnesium heavy would be better for this style of driving: stop n go, idling, cold/warm starts, not getting to temp, etc. The calcium heavy Euro additive packages being better for higher engine temps and more spirited driving.
@Hohn wrote about this and hypothesized perhaps that is why some of the VW and Audi engines get stuck rings. (I can't take credit.) They are relegated to grocery getting and mall crawling whereas they are driven hard in Europe but in both places they run the same oil (calcium heavy), and they get stuck rings and burn oil here and not in Europe.
Is there a name for this test? Is there an equivalent for MB and Porsche? Or unique to VW?