I only found one post on the forum and it was by one guy who said his winter starts were easier with Castrol Edge than Mobile One.

I saw a little display at the auto parts store showing the difference in Castrol Edge to other oil and it was impressive.


https://www.youtube.com/watch?v=g7Tc-YkJRxk (skip to the 2:50 mark on this video)

and

https://www.youtube.com/watch?v=I3GJND4jB2I


and


https://www.youtube.com/watch?v=Dwt5wRrL0yk


https://www.youtube.com/watch?v=XGmmw766wwM