loops like specs for other viscosities are updated to GF-6, but not 0w-20. Website out of date?
https://www.shell-livedocs.com/data/published/en-US/e847d1bf-da55-4b8f-8bd2-ed73c21c2e06.pdf
https://www.shell-livedocs.com/data/published/en-US/e847d1bf-da55-4b8f-8bd2-ed73c21c2e06.pdf