Refinery Processes. Crude oil refineries employ some of the United States’ top scientists, engineers, and safety professionals to ensure that products are produced efficiently and safely. US refineries process about 17 million barrels of crude oil a day. How a Refinery Works Petroleum refining is the process where crude oil is separated into useful products such as gasoline and diesel fuel. Using distillation, the different boiling points allow the products to be separated. Advanced methods are then employed to further process it into fuels and other products. When you find some oil, you might want to refine it in a refinery to turn the oil into fuel and increase efficency.. Experiment Edit. In this tester's experiments, a single warmed up and watercooled combustion engine (green status) was tested. It was used to power a refinery with a steam engine drawing the refined fuel out to a holding tank. Refinery contains information about the BuildCraft mod. in concert with one another and fed into the Refinery via Conductive Pipes will work reasonably well. The Refinery is a BuildCraft block that converts Oil into Fuel at a ratio or Biomass into Biofuel at a ratio. Oil and Biomass can be pumped. To operate, oil must be put into the refinery either by buckets or fluid pipes. This will be placed in the two rear tanks (up to 8,mB), while the fuel will be placed .