The purge fluids dialogue claims there is lubricant in there, but there is no reason why lubricant ought to be in there.
Mining the pipes and replacing them also leads the box to claim a small amount of lubricant in the system -- despite all the pipes only containing light oil and having never been ...

I attempt to connect two fluid systems: each contains only light oil.
I'm not allowed to do so -- contrary to expectations.
Construction robots are however able to do so.

In the layout, I am converting advanced oil outputs other than petroleum into solid fuel, except for one heavy oil output which ...