What does pour pt mean? Apparently it means it will move x distance in y time. But x and y could be scary if we knew the values.
Mobil 5000 10w40 has a pour pt of -33degF.
Did my slosh test on a qt of Mobil 5000 10w40 the other day (24 hours in a freezer at (approx.) -12degF) - took it out of the freezer - shook it has hard as I could - might as well been shaking a brick. No discernable movement of the fluid at all.
(Same as my result with M1 HM 10w30 - pour pt -54degC)
RP is designed primarily as a high-performance oil, that will be used in higher temps. Doesn't seem like they've focused on the cold-weather properties of this oil.
That said, the 5W-40 and new 0W-40 grades seem to have decent cold-temp numbers....