I had the experience that when I let my oil refinery run and I came back later it was still consuming wood but didn't convert oil to fuel anymore.
I had to re-run it. Dunno if this is related to this plugin or maybe Furnace Splitter.

Furnace Splitter doesnt calc wood correctly with QuickSmelt

It's not about that the amount of wood may be too much or less it's about the fact that the oil refinery was working but only wood was consumed and no fuel produced. When I stopped it just turned it on again, it worked the normal way again.
That happened two times now.

Merged post

This time it just stopped right there. I just had to click Turn On and it worked again. What is this?