Is the Black Goo = Stuff in Sacrificial Egr Drinks?

I think so, it seems to break down with contact to air and get more liquid and black.

I think that although it may not be the same liquid, it is related in someway. If the concept of the black goo and the concept of the substance used by the engineer were intended to be different, they wouldn't have used such a similar substance. They would have used something else, an object he eats, a gas, or any object of some sort with a much different color and composition.

EGR101 : It's the same substance augmented with sacramental supplements. The stuff on LV 223 seems to be rawer, less evolved, and used for destructive rather than creative purposes. So it would seem to me. A good background is to think of the black goo as being the primeval chaotic water of Nun, or the Norse Eitr, both creative substances when wielded as a sacrament by a god, or legislated by the Logos, or Divine Word, but entropic and destructive when not. Whatever the engineers were doing on LV 223 it certainly didn't involve the creative sacraments of Osiris, Horus, or Odin.

Rawer is incorrect it is more raw.

Gahlaktus: that makes more better sense ;) than any other idea I have heard so far.