I checked a few bottles of Mobil 1 at an auto parts store and this is what I found listed on the bottles:
Code:
oil weight/pour point on bottle/PDS pour point/PDS flashpoint
10w30 -47C -45C 224C
5w30 -47C -54C 230C
5w20 -47C -47C 228C
0w30 -47C -54C 228C
0w40 -54C -54C 236C
0w20 -54C NA NA
Also note that all the bottles claim the oils protect up to 205 C, not sure what this means, but it doesn't coincide with the flashpoint of the 5 types that have an online PDS. Also the Mobil website has a blurb saying the 0w20 pours at temps as low as
-47C and protects at temps as high as 205C, this is similar to the claims on the bottle except the pour point listed on the bottle is lower. So is there a point to all this? The PDS lists an ASTM D97 Pour point and in some cases the pour point listed on the bottle (the wording is the same on all of them only the temp changes) is the same as the PDS and in other cases it is not. I would go with 0w20 or 0w30 if choosing Mobil 1 for extreme cold, I have also used 5w30 Mobil 1 for a few winters in Maine, but it is not nearly as cold here as in some parts of Canada.