Does cooking oil ever go bad?

if you have cooking oil in your deep fryer and never used it, can it go bad?Does cooking oil ever go bad?
yes it will, it goes rancid you can tell by the smell, I would not use oil after 3 times.Does cooking oil ever go bad?
Yes. Oil gets rancid over time.
Yea. It goes bad when there isnt no yellow color to it.
oil goes bad fairly quickly


I would not use oil that was left in a deep fryer if it is more than a month old (and if it was used I would not use it again if it was more than a week old)
It does not go bad.
Not really.