Here are the commonly found oils that are true synthetics sold in the US:
Red Line
Royal Purple
Amsoil
Castrol European Formula (aka German Castrol)…only comes in 0W-30, sold at AutoZone.
There are others...this is not an all inclusive list.
How about the others marketed as synthetic?
Mobil 1 was PAO based until recently…it’s been confirmed that at least two of their oils have been switched to Group III. Mobil 1 EP 5W-30 and 15W-50. Since these are Mobil’s top-of-the-line, I suspect their remaining oils have done the same.
http://www.supramania.com/forums/showthread.php?t=38811