the German castrol they are talking about WAS that good, not anymore.
according to gohan post here :
Originally Posted by ChrisD46 It appears the synthetic oils that Castrol is now supplying the USA are a bit underwhelming - there is only so much you can do with additives if the Castrol base oils are lacking . Underwhelming in what way? Are they not meeting the mfg specifications? Are engines...
bobistheoilguy.com
replaced by other formulations:
467680-BE02: Belgian Castrol 0W-30 A3/B4, half-PAO-based,
463737-BE02: Belgian Castrol 0W-30 C3, PAO-based ,
https://msdspds.castrol.com/ussds/a...1DB2A943C7D8025894800581046/$File/2936971.pdf
467465-BE02: Belgian Castrol 0W-40 A3/B4, half-PAO-based,
so as we see ,the only one full pao based is the second one Castrol 0W-30 C3. its this one if you can find it.we in europe have it on market already.might give it a try.