Much of the olive oil you see in stores, and that would include Costco, is taken from places like Spain and Italy, and mixed with fake oil. I do NOT buy any foreign oil for this reason. All my purchases are from local suppliers here in Australia, and always ORGANIC certified, which is different from VIRGIN. You may be interested in reading this disturbing story. https://www.abc.net.au/4corners/food-fraud:-an-organised-crime/13544610