Was hoping to use Castrol Edge 0w40 A3/B4 for my 2016 Merdedes e250 diesel, but it is not approved by MB for 229.51. And there is nothing in the Castrol Edge lineup in a 0w40 or 5w40 that is MB 229.51 approved and available in Canada. So that being the case, thinking to go with Mobile 1 ESP...