BasicBrowns Bull Driven Sesame Oil LBull driven oil Ganuga oil are extracted naturally. It is a completely chemical free manufacturing process. In this method, the bulls are attached to a setup consisting of a wooden pit and a pestle. As the bull moves in a circular orbit, it causes the pestle to rotate, exerting lateral pressure on the upper chest of the pit, first pulverizing the oilseed and then crushing out its oil. The oil is then extracted and filtered using natural sunlight.