Guys, I dont mean to sound unsupportive or anything but, I am reading about folks seriously considering 20 weight oils. Why would anyone ever run a 20weight oil in
Regardless what the manual says, we all know why the manual say that, it has been covered here before and has nothing to do with engine protection.
Even in the middle of an Minnesota winter there are better oils there (0w-30,0w-40).
I wouldn't take a 20 weight oil even it was free PAO.