The last time I changed the oil I used 0w40 Castro’s edge euro formula. At the time, it was regarded to be great because of its certification as a true synthetic in Germany. Since then, it’s oil grade in Germany has been downgraded to an HC-Synthetic. What are the best LL-01 oils right now (base IV/V maybe)? I was looking into Pennzoil platinum euro because it’s GTL process, but I do know it isn’t a base IV/V. I’m also no expert on this stuff so feel free to correct me. If there are no true great LL-01s left, I might just go with that Pennzoil ultra platinum stuff. I change my oil every 6-7k anyway.