Gourmet police officers have been trained to detect “counterfeit” extra virgin olive oil from the real thing. You can read the story in the London Telegraph.
Italy produces less olive oil than the country consumes, making large volume (grocery store) olive oils especially suspect. The difference is made up by imports from Spain, Tunisia, Greece and Turkey.
We stand by our small production olive oils from family estates. When they run out of a year’s production, we just can’t get any more. They’re not buying olive oil for bottling!