I am still not sure why most people bad mouth Castrol Syntec,,there a lot of other group III, called synt.,,why is Castrol singled out so badly,,,though I have also heard they are reformulating the north american lube,again,,OH by the way Syntec really is a great oil,given quot,,compaired to real life use and labs,,,though there better brands in use that exceed,,as Schaeffers,,for about same $$$,,,,,,,,,,,,,BL