Agree. M1 ESP 5W-30 (BMW, VW, MB) or M1 ESP X3 0W-40 (VW 511 00, Porsche C40).
Not 'consistently' but with Millers CFS oils. Fe and Cu numbers are fine, however IMHO Al is actually a reason for some concern.
Apparently your K20Z4 loves Boron (1004 ppm?:unsure:). Just 13 ppm Al instead of ~30...