I used to use Castrol 0w-40, then they discontinued that and started selling a 5w-40 as their euro oil, now it seems that oil is no longer sold and they're selling a 5w-30 as their euro oil. The new 5w-30 has LL-01 and 229.5 approval, so I guess I'll use it in my cars although I've always used a 40 weight oil. I can't really find an explanation for why they have made the changes, does anyone know?