Sorry I didn’t respond to that part.
The answer is yes. Any kind of oil will last much longer if kept in the fridge. For the maximum lifespan, DO NOT open a new bottle (all that would do is allow more oxygen in), and place in fridge or freezer.
I have a large bottle of ultra virgin Olive oil in my fridge I never opened. I suspect it would last up to five years unopened, especially since OO has alot of natural antioxidants in it.
Thanks! Much appreciated.