Oil, though, may have evolved into a term given to some high energy density rocks in space. I say this because that would make the most sense. It would also provide the EFL with something to do. Using fossil fuels as a fuel source in an age of cold fusion and faster-than-light travel seems silly, also. So, yeah, in a sense, oil still is drilled for in Gallia.
Fuel by any other name would burn as well.
I'm not sure if it works the other way around.
