Yes the Cdn version of M1 0W-40 has been up-dated to SN. See the Cdn PDS below:
http://www.imperialoil.ca/Canada-English/Files/Products_Lubes/Mobil_1_0w40.pdf
M1 0W-40 is not an especially great extreme cold performer, not with a MRV @-40 of 35,000cP.
A better cold performer at all temp's is the Mobil Delvac Elite 222 0W-30 (nee XD-3 0W-30). It's a true PAO based synthetic with a MRV of only 14,900cP. That's better than most 0W-20s.
It's a heavy 30wt oil at operating temp's with it's HTHSV >3.5cP.
Something to consider.
http://www.imperialoil.ca/Canada-English/Files/Products_Lubes/Mobil_1_0w40.pdf
M1 0W-40 is not an especially great extreme cold performer, not with a MRV @-40 of 35,000cP.
A better cold performer at all temp's is the Mobil Delvac Elite 222 0W-30 (nee XD-3 0W-30). It's a true PAO based synthetic with a MRV of only 14,900cP. That's better than most 0W-20s.
It's a heavy 30wt oil at operating temp's with it's HTHSV >3.5cP.
Something to consider.