Been running Stanadyne in all my diesels for last 15 years. two built trucks a 6.5 Yukon and a Duramax crew. The old Massey I traded for my new and not yet delivered B2920. It'll get Stanadyne also. Trucks saw -20 in No PA and NY never an issue.
Just noticed that Auto Zone is stocking Stanadyne. One interesting note is that Stanadyne is the only manufacturer of fuel injection equipment that also makes a fuel additive. Ed B