I usually dispose after each use but found this on it:
Storing your Oil: With the oil filtered and in your storage container you need to find a cool, dry, and dark place to store the oil. It would be great if you could keep it refrigerated, but if you are like me you don't have that kind of space. Any place you have that fits the criteria (but won't let the oil freeze) will work. Properly stored, your oil will last but to 6 months.
Reusing your Oil: Before you move the oil to use it again examine the oil. If it has separated or smells bad you will need to dispose of it and start with a new batch. Otherwise pour it back into your pot and heat it up as normal. Remember that you need to keep the total heating time on any oil is six hours. Don't let it preheat for too long and turn off the burner 5 minutes before the turkey is done to start it cooling down as quickly as possible. Once your oil hits the six hour mark you need to dispose of your oil.
