Yes, mustard seeds are indeed used to make oil, specifically mustard oil.
Mustard oil is produced by crushing and pressing mustard seeds. The process typically involves feeding the seeds into an oil press machine, where they are crushed and pressed for a period (potentially an hour or more, depending on the quantity of seeds). This process extracts the oil. After the initial pressing, the seed cake is often further processed to extract any remaining oil. The typical yield is around 26% oil from the initial pressing.
