Whatever oil comes in your favorite color bottle.
We really choose oil based on whatever comes in a container that we really like or matches the clothes we are wearing that day.. don’t be fooled /s
For me, most of the time it's the pretty bright-ish blue one that costs the least. Its API SN Plus just like that shiny silver one. The black one has an allure that makes me think about it; the yellow ones make me think of urine.
..or is it /s ?