wikipedia & websites of redline, royal purple, mobil1, liqui moly, profi-oils, etc. could be the best sources to study about the oils.
there is a very funny truth about the organic oils. We can literely drink or consume them in the cooking ( the packed organic oils).
But its application in cars are zero.
my personal experience of using toyota's or even any other local oils is not good. It gave bad performance in the cars.
And when you know that toyota, honda & suzuki donot produce the oils. They just buy from the local companies (total, shell, pso, etc), tag them, and topping up their bank balances like rocket heading sky.