If you look at foreign MSDS listings they have to apparently show things by percentages. Shows M1 0W-20 Extended Protection to be 60-70% PAO If you Look at the Canada MSDS on Mobil 1 0W-20
Go to Mobil 1 MSDS website Link below. Plug in Canada.
This is probably old news to some but if this is accurate I find this phenomenal. Wish me luck on running the M1EP 0W-20 its MRV is my big attraction for the winter & the PAO.
Now I know how they flow down to -54 Celsius / -65 Fahrenheit
Believe all of their 0W oils use much PAO. Look for " Decene " on the MSDS List
5W+ are mostly group III I believe.
http://www.msds.exxonmobil.com/IntApps/psims/psims.aspx