Yes you can freeze oil. At a cold temperature the oil will slowly thicken until a point where it becomes solids similar to fat. However in this stated it doesn't become hardened like a liquid would.
Yes, vegetable oil will freeze. Unfortunately, once defrosted it will separate and be unpalatable. It must be discarded. Also, be cautious because the contents may expand and rupture the container.
Why not. If it will freez it will remain long. Also can use it very long time. It
have more density than other oils. so it freeze easly. It is also called vanaspathy.