IIRC, the super low Noack was only when GTL was first introduced. For example, PP 0w-20 tested in 2017 had a Noack of 10.3%:
The Petroleum Quality Institute of America (PQIA) is an independent resource for information and insights on the quality of lubricants in the marketplace. Our mission is to serve the consumer of lubricants by randomly sampling and independently testing lubricants taken from the field. Test...
www.pqiadata.org
Platinum High Mileage 0w-20 tested in February of this year had a Noack of 10%:
pqia.org
Mobil 1 High Mileage 0w-20 tested at the same time had a Noack of 9.7%:
pqia.org
Mobil 1 AFE 0w-20 tested in 2017 had a Noack of 10.7%:
The Petroleum Quality Institute of America (PQIA) is an independent resource for information and insights on the quality of lubricants in the marketplace. Our mission is to serve the consumer of lubricants by randomly sampling and independently testing lubricants taken from the field. Test...
www.pqiadata.org
IIRC, somebody e-mailed Mobil and got a response that EP 0w-20 was like 8.9%?
I believe the Noack figure vanished from the SOPUS data sheets around the same time it started going up, so it's been a while now.