I set up oil burning boiler attached to 3 steam engines and connected with light oil and water to correct inlets but it's not producing power. I tried first with angels petrochem fuel oil, but thought maybe I need base one so dismantled and rebuilt the system. Weird thing is that if I hover over the boiler it says theres 200 water and 200 light oil with 1.5MJ fuel value and 0 steam at 25 C. If I click on the boiler the window popup says there is 200 units of fuel oil with 0 MJ fuel value.

there is some unusual strangeness in the new pipe system where if you have an item like a boiler, the fluid flows out of the output box so quickly it says it has 0 fluid in it. Otherwise though, is it possible that another mod, maybe angels, has removed the fuel value from the fluid you're trying to use? it seems to work fine with just all of bob's mods.