When I use the chart you referenced and a blended oil calculator for 60% 0w20 and 40% 0w40 I come up with these values:
100C 10.4
40C 55.1
0C 393.7
VI 181
However, I'm not sure what effect the VIIs or PPDs would have, if any.
Reasonably close to the 0w30 on the same chart.