Originally Posted by
intuition
According to OW lounge search:
Access for eligible customers traveling on any oneworld member airline.
This lounge is exclusively for oneworld Emerald card holders and their guests.
Also, I think we discussed somewhere recently that AY has included some odd codeshares in the lounge access, like SU.
If you mean AY-on-SU, that would seem normal at least for AY+ status and J - don't know about other OW tiers.
SU proper uses Almost@home at HEL.