Using Extra Virgin Olive Oil
Best when Fresh
Make sure the label says extra virgin olive oil, and displays a harvest or milling date in addition to the best use date. The harvest date should be within 12 months. Extra virgin oil is “best used” within 18 months. Make sure the oil is purchased well in advance of the best-used date.
Store extra virgin olive oil from light, air and heat. Use it up once it is open. Rancidity is one of the major culprits—an oil that has been exposed to heat or light or is simply old. So what was once a delicious, fruity, pungent extra virgin olive oil may have been stored improperly, been on store or home shelves too long, open for too long, or sitting next to the stove.