The Oil Refinery recipe for Crude Oil Distillation seems to be broken. I've got my de-salted oil, heat, and steam hooked up, and not getting any outputs.

Nevermind, finally found the recipe to warm the inupt oil.

Do you think i should add a seperate fluid for heated oil? I thought it would be visible but thw base game doesnt use that feature often so it might be frustrating if you dont know about it

Just put it in the recipe description that the oil has to boil.

A different issue I encountered.

Syntax.

Tried Middle Oil Separation, only there isn't a 'Middle Oil' I can find. Was it supposed to be 'Distillates'?

in the petroluem refinery there should be a recipe for "Middle distillates separation".

Yeah, it's there. I wanted to use Middle Oil because something needed Light Oil, and I didn't want to bake coke I didn't have any use for just to get some.