I've been using the Mobil 1 ESP Formula 5w30 for my diesel which requires LL04 oil but I've finally run out of my stash. It seems there isn't much to pick from except from the dealer who sells the BMW branded oil. Is there any better? It seems I can't find any LL04 oil the local car parts shops so it looks like I'll have to order online. How do Motul, Castrol, Pentosin, etc rate amongst themselves? Any help would be appreciated