Seems that oil doesn't generate correctly in the added bionomes, atleast very sparse.

It does work, but it takes some hunting.! 😄

Oo, good :) Seems to follow the forestry standard for it, it tends to be found in the mini jungle bionomes. Would it be possible to get it to spawn at the same rate as in the normal bionomes or is this a buildcraft issue?

It does spawn at the same rate, but the terrain differences make it more scare. It uses the Buildcraft code to spawn

Sweet, definately gonna add EBXL on my server! :)