Foaming is still a concern.
But again it depends on the oil. If you’re looking a 5w40, it’s going to have different anti foaming properties vs your bargain basement fleet 15w40 oil.
People running HDEO’s in PCEO applications aren’t running the cheapest of the cheap. They’re using very high end oils. Thus, formulated differently.
If you put *insert brand here* national account, fleet oil special 15w40, in a high revving bike, you’ll have a different outcome vs *insert brand here* 5w40 that is normally, a very premium product.