Toyota just issued a TSB to their dealers stating that 0W-8 and 0W-16 may be lighter on the ground in the coming weeks.
They were recommended to use heavier weight oils.
In other news, if you look at the viscosity recommendations for vehicles located in foreign countries that have climates similar to your own, you'll likely wind up with an oil viscosity more focuesd on longevity instead of federally driven CAFE regulations.
https://www.thedrive.com/news/alleged-toyota-dealer-bulletin-warns-of-looming-motor-oil-shortage
They were recommended to use heavier weight oils.
In other news, if you look at the viscosity recommendations for vehicles located in foreign countries that have climates similar to your own, you'll likely wind up with an oil viscosity more focuesd on longevity instead of federally driven CAFE regulations.
https://www.thedrive.com/news/alleged-toyota-dealer-bulletin-warns-of-looming-motor-oil-shortage