The industry part of Advanced Autonomous Industries. Adds burner machines, some new intermediate ingredients, powered offshore pumps, and more. Alters tech and recipes. Other AAI mods are not required.
According to FNEI, there appear to be two carbon-based recipes for vehicle fuel: one consumes 3 carbon (18 MJ) and produces 2 fuel (20 MJ), the other consumes 7 carbon (42 MJ) and produces 3 fuel (30 MJ).
I should think that the latter one is incorrect. Unfortunately, it is also the one that takes priority.