VRP 5W-30 is fairly thick, with a high KV40 and a low viscosity index. Here's a chart comparing its kinematic viscosity with a higher-VI 0W-20 (Pennzoil Platinum). The VRP has around twice the viscosity. The difference is equivalent to 9°C / 16°F, which is pretty significant.
Technically, KV is not the most relevant viscosity metric at these temperatures. A CCS measurement at the actual temperature of the oil would be more relevant, but the point is that there could be a fairly large difference, especially since the VRP is thick at low temperatures for a 5W-30.
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