I did a search for GTL Oil on google and found that it's a process of turning gases into liquids to create lubricants and fuels.
Is there anyone producing or planning to produce such a fuel/oil? That I don't know. I'm sure there's some big money backing up this research so I'd say it's a safe bet we'll be seeing this eventually.
Isn't PAO made by converting a gas molecule into liquid? I've seen some suggest that PAO is actually a petroleum product because it is made by converting a (petroleum) gas into liquid.
How does GTL differ so much that it is considered a group III+ ?
As I understand it, its mainly natural gas that is converted to oil for these "GTL" lubes. Pennzoil Platinum is an example, IIRC. Does anyone have more info on them?
Make sure you follow all the links, because there are some excellent articles on the subject, and the Wikipedia article explains the process in detail, but is easy to understand.