Mobil vs. Castroil decision was ridiculous - Mobil created a completely new fluid from NG via a series of chemical reactions, whereas what Castroil did was refine a naturally occurring liquid to higher purity levels than ordinary motor oils - unless we're missing part of the story, and Castroil performed similar chemical modifications to their oil that results in something that you can't actually distill from crude oil - then I agree with the decision.
That ruling sort of supports our fight against DS EE-EPA - it is a man-made synthetic molecule, and since it's sold in V as a drug, that makes the DS form a drug as well.