I have seen alot of different oils mentioned on many different topics about oil except this one. I was hoping project farm would have tested it but I didnt find anything. Here is a link to their tech sheet.
They make too many x and 8100 branded oils, theres too many to keep track of. The one i use is the dexos 2 8100 xclean xfe in 5w30, they make a 5w40 version of it IIRC. It lists gm and opel on the label without others