Well, if you are talking about which brand is best, a friend of mine was a PhD chemist working for an oil company. When asked which oil he used his reply was "Whichever big-name brand is on special offer in the supermarket".
If we're taking viscosity, I go with Slybunda. Looking at Toyota Data, generally, over a period of years, they've moved to recommending thinner oils than they used to for a given engine. We still have relatively mild (warm) winters in the UK. It all goes back to the old oil advert which claimed that more engine wear was done starting up and reversing off the drive on a cold morning than in the next 100 miles. Whatever happened to oil adverts?