Question: does peanut oil go bad?
Answer: When kept in the pantry, sealed bottles of peanut oil will keep for 3 years. On the other hand, opened bottles of peanut oil will keep in the pantry for a year or so. As for peanut oil that's nearing its expiry date, you can store the oil in the fridge. ... Peanut oil kept in the fridge will stay fresh for 3 to 4 years.