Originally Posted by
guamster
Necropost.
I was just at the HD dealership in Blaine, Minnesota. I just purchased a 2003 XB9R and was looking to buy some oil for it. The parts clerk asked me if I was running conventional or synthetic. I indicated that I did not know what PO was running and that I would need to reach out to him to confirm. Parts clerk then indicated that you can run conventional and then move on to synthetic but that you can't go from synthetic back to conventional. Anyone care to chime in on this?