Bosch cartridge €3, Castrol Edge V 0w-20 €40.
Castrol cannot label it as Fully synthetic in Germany, because it is not PAO base.
It is ACEA C5 standard, similar to Mobil 1 ESP for a hybrid Prius 3 engine in Corolla Station Wagon.
These are the real deal of PAO oil. Ravenol VSE ~65% PAO 1-Decene Homopolymer, and older version of Aral (BP subsidiary) 0w20 Porsche C20 Oil. They are too expensive, and now Aral make it a bit cheaper, but no longer labeled as Fully synthetic, just like its brother Castrol Edge.