How long can you store used frying oil?
Likewise, people ask, can I leave oil in my deep fryer?
Answer: Yes! Oil can be left in your deep fryer but you will have to check it each time you are reusing it see if it has become rancid. If you are going to leave it in your fryer, make sure to place a tight enough lid over it to help keep its purity. It is however better if you store it in the refrigerator.
Secondly, can you reuse oil after frying fish? Generally, it's fine to reuse deep-fry oil. In a lot of restaurants, fryer oil only gets changed when it starts to smoke or make food taste "off". It is not necessary to refrigerate used oil. Leaving bits for days at varied temperatures could negatively affect the flavor, especially since you were frying fish.
Beside above, how can you tell if deep fryer oil is bad?
The surest way to determine that oil has degraded to the point of discard is when food begins to have an “off” odor or taste. This may manifest itself as a bitter taste, especially a bitter aftertaste. The food may also taste soapy.
How can you tell if oil is rancid?
You usually can tell if oil has gone rancid by taking a whiff. If it smells off (some people say it smells like crayons!), then it's time to toss the bottle and buy a new one. If you're not 100% sure, heat a few tablespoons in a pan and take another whiff.