On November 26, 2017, Greek police arrested and charged seven individuals for fraudulently selling large quantities of sunflower oil as olive oil, as reported in the Washington Post.
The oil was packaged in 5 liter cans and sold as "extra-virgin olive oil, straight from the producer," -- but was actually sunflower oil with dye added to give a green tint. It was sold to consumers in Greece, Germany, and other European countries, at about half the price of authentic olive oil.
Sunflower oil normally has a different fatty acids profile than olive oil, containing only about 30% oleic acid (a healthy monounsaturated omega-9 fatty acid), about half the concentration found in extra virgin olive oils. It's not clear what tests were used to determine the composition of the fake olive oil sold in Greece. In Pinoypharmacy.com's Extra Virgin Olive Oils Review, all products were analyzed for their fatty acid profile and were required to have an oleic acid of at least 55% to 83%, as well as meet other chemical and sensory tests to identify bogus products and identify high quality extra virgin olive oil.
To read the Washington Post article, use the red link below.