A more involved Bergius process. Make oil from algae, which in turn is made from water, sulfur and stone.
Mods introducing new content into the game.
Things related to oil and other fluids.
What are the pre-reqs for this? I am having troubles finding the route to do this.
Using angels + bobs + rso
Are you using PetroChem? That changes the oil processing to be more interesting, but more likely than not breaks my way of doing things.