How long can I keep olive oil?
In contrast to wine, olive oil does not get better with age. Its essential components, such as mono-unsaturated fatty acids, vitamin E and polyphenols are broken down when stored for a long time. This also creates substances which negatively impact on taste. That's why you should use olive oil within a year or at most two years of it being harvested. The use-by dates give you a safe guidance value of good quality and taste.