Originally Posted by Snagglefoot
And here is the Mobil SDS for 0w30. They didn't say what the CCS Viscosity was. Their MRV Viscosity was a bit lower but what the hey, let's look at pour point. -51 vs -50 for a Pennzoil win.
We know the M1's CCS viscosity had to be 6200 cP or less at -35C since it is a 0WXX...even right at 6200 it's less than 7% higher that the LX result.
Based on comments by Shannow, the lower MRV result for the M1 suggests that it has less pour point depressant than the LX unless its CCS viscosity is much lower than 5800. Shannow suggested the the ratio of MRV to CCS viscosity would be 2 for an oil with no PPD.
Multiple discussions on here have established that pour point has little to do with getting a car started in the cold. We see plenty of 5W30s with super low pour points, but they are still 5Ws and will not outperform a 0W in extremely cold conditions.