The CTC/Cycling UK forums' IGH guru 'Brucey' used to swear by running the Shimano hubs in a semi-fluid grease rather than oil. This was the IGH megathread, but I'm pretty sure a search will bring up Alfine-specific ones as well: https://forum.cyclinguk.org/viewtopic.php?t=93935
The CTC/Cycling UK forums' IGH guru 'Brucey' used to swear by running the Shimano hubs in a semi-fluid grease rather than oil. This was the IGH megathread, but I'm pretty sure a search will bring up Alfine-specific ones as well: https://forum.cyclinguk.org/viewtopic.php?t=93935