I was looking at the data sheets of a few 15w40 PCMO out of curiosity and it seems like the winner is the Shell but i need you to help me understand what the data sheet says. Pour point looks very low for a 15w40, flash point seems very high too (low noack?) All these values look better for this oil than they do for the Castrol and Total products and they are even better than Shell HX7 10w40 which is a higher end product (pour point : -39°C, flash point : 227°C, -30°C MRV : 21400). I don't quite understand what MRV is and if it is even relevant when considering cold start flow/wear. Are these values indicative of a group II/III mix? I know that every modern SN 10w40 sold here is only a group II/III and that group I isn't used anymore but what about "conventional" 15w40 oils with SN or SN+ ratings like this one?