Originally Posted by buster
Both of the AFE oils are solid choices that have outstanding cold weather attributes. They also meet D1 G2. The 0w30 has an MRV @ -40ºC (ASTM D4684) of 13,250. It's not very shear stable though, by design as the HT/HS is only 3.0. Per XOM it is of the GM 4178M level of quality. If I lived in an area with extremely cold winter temps, AFE 0w20/30 would be my choice. These oils from what I understand also have slightly better friction modification than the other M1 oils.
Both have a slug of PAO in them, with the majority being III+ with V. The 0w16 is all PAO/V.
I am using 0W30 AFE right now, I have to report that it "feels" like every other oil I have used!
;^)
Haven't had a severe enough cold snap to test whether I think my car turns over faster than with the 5W30s I have used in the past. You can imagine how scientific this test would be...
Strangely enough, going by the XOM MSDS archive, 0W30 is 10-20% PAO while 5W30 is 20-30%! Sheets are from 2017 for 0W30 and 2015 for 5W30.