thanks all for the Castrol info, as I looked it up too, the oil that I would like to see the mrv and true ccs is Valvoline Extended Protection 0w20 & 5w-30 along with the Valvoline Restore and Protect .tried to call Valvoline and they are tight lipped on their specifications ,only the generic printed specs, the guy I talked to said I would not even understand this spec,,makes (very insulting) me not to want to use their products though they are probably good , as too Mobil is not saying much as to their ccs and mrv either. Seems like a secret with some oil company's (MRV&CCS) along with TRUE pour points.