What are the grades of olive oil?
* Extra-virgin olive oil comes from cold pressing of the olives, contains no more than 0.8% acidity, and is judged to have a superior taste. There can be no refined oil in extra-virgin olive oil. * Virgin olive oil has an acidity less than 2%, and judged to have a good taste. There can be no refined oil in virgin olive oil. * Pure olive oil. Oils labeled as Pure olive oil or Olive oil are usually a blend of refined olive oil and one of the above two categories of virgin olive oil. * Olive oil is a blend of virgin oil and refined oil, containing no more than 1.5% acidity. It commonly lacks a strong flavor. * Olive-pomace oil is a blend of refined pomace olive oil and possibly some virgin oil. It is fit for consumption, but it may not be called olive oil. Olive-pomace oil is rarely found in a grocery store; it is often used for certain kinds of cooking in restaurants. * Lampante oil is olive oil not used for consumption; lampante comes from olive oil's ancient use as fuel in oil-burning lamps. Lampante oil is mostly used in the industrial market.