Oil Fabricators+refineries+ max sized HP boilers+ powerconverters converting steam to MJ= 39% more fuel than the entire setup is consuming. Now that's a loophole you actually after. So every 3 boilers will fuel another one then a tab bit more fuel for your every own use. Just need a tiny oil spout to "jumpstart" a single HP to start the positive looping.
I tried this, but it dosen't seem to work. could you post a picture/pictures of the setup? I think I'm just a bit confused.