Expeller Pressed

It turns out you can simply expeller press rapeseed and all the rest and get the oil, which is what I presume most of the producers do who stock the shelves at the health food store. But it will take some research to find out for sure, and how much of it. I bet if I simply walk in to the food co op and ask what percentage of prepared foods that contain vegetable oil are 'process and chemical free,' I will get a quick answer.