13% is just the maximum NOACK loss for dexos1 Gen 2 and 15% is the limit for either SN or GF5, can't remember which.
The CCS and MRV numbers shown are also just the maximum values for the grades shown.
So, there really isn't any meaningful info about these particular oils given for those parameters, just spec limits.
I am surprised that the VI is higher for the 5W20 than the 0W20! Don't quite get that.
I'm sure these are all quite serviceable oils!
Yep, some of these figures like Noack are just the spec limit - which it meets, they are not the real numbers or data measured directly on the oil. I'm sure they have the real numbers, it would be nice of they shared them.
All the VI are very close, I was expecting a bigger difference.
I'm sure they are all good oils. If cold starting is not an issue, I would select the oil with the highest density and the highest FP, that would be a suitable viscosity grade for my application.