Pennzoil Euro L 5W-30 doesn't have MB 229.52, but Pennzoil Euro LX 0W30 does.The MB 229.52 standard is probably the most stringent euro standard in terms of oxidation. M1 ESP 5W-30 has this cert. The Pennzoil Euro L doesn't. Not sure about the others.
Bill7, Would you consider using a 0W-30?