Since oil is lighter than water so it floats on the water surface, so can use wood as a fuel, water catchment and flows through the bottom of the plate divider (especially diesel or fuel type, high flash point).
Since oil is lighter than water It floats on water So you can use a piece of wood as a fuel reservoir and let the water flow through the bottom of the septum. (Especially diesel oil or high flash point).
Because oil lighter than water will float on water. So can be used as a storage plate oil and let the water flow through the bottom of the plate. (especially diesel oil type high flash point).