Yes – grease is escaping into the sea, and whether EAL or mineral based this is unacceptable. Grease escaping is evidence that the seals have failed, are damaged, or are incapable of operating with the bearing clearances imposed. Seals must be replaced with new items and in the case of increased bearing clearance, should be with a seal capable of operating with the full range of rudderstock movement.  This can usually be completed in active service alongside, but a review of the system design and access would be required to offer a full proposal from AtZ.