In auto oils, "Full Synthetic" in almost all cases means Group III oil. I don't know of a PAO Group IV oil. Mobil 1, Amsoil, all the oils are mostly Group III with maybe some PAO or Ester added. Mobil 1 was a Group IV PAO oil until the court decided it was okay for Castrol to market a Group III oil as "synthetic". That caused Mobil and maybe everybody else to switch to Group III because it was cheaper to produce. I don't know what is in motorcycle oils because all the oil companies consider their formulations proprietary. Mobil used to brag about their oil being a PAO but not any more because it isn't. On the truck forum I read, a member works in an oil co. lab and he was the one who corrected me when I posted that Amsoil was still a Group IV PAO oil. He also told us many times we were wasting our money buying "synthetic" because he has access to the oil testing. He used Group II Pennzoil or Havoline in his truck and ran it 7500 miles testing it along the way. I think PUC is the smartest oil purchaser. The proof is in the pudding. If you can get a minimum of 225k miles out of your old $1200 bike using cheap oil, why not.