On the fourth brand of oil now. Seemed to help at first, but then everything does. At first. Had high hopes for the Lucas Hub Oil designed to address these pesky leaks in heavy equipment hubs. Seemed to help. At first.
When I changed the large seal in 2010, it stopped maybe 80% of the leaking. Maybe more. But the splatter persisted and I embarked on the odyssey above with the fractured case and all. Even then the "inner" seal (the small one deep inside the case), leaked out through the left side and dripped down onto the wheel. It was only 3,000 miles after the "repair" that the right side drip appeared. Looking at the diagrams, I can see no other seals except the forward (pinion) seal which has shown no interest in the fray.
If it starts now, I know who to call for bringing it up . . .