It is best not to store it at room temperature for more than eighteen months. In general, the shelf life of sesame oil is about 18 months, but if you haven't eaten it for a long time and the shelf life has passed, you'd better not eat it. Therefore, sesame oil should be used up within 1.5 years as far as possible, otherwise the expired sesame oil will have a particularly pungent taste, which is the so-called "hala" taste. It shows that sesame oil has been oxidized and decomposed, toxic and inedible.