Hi Wino, I went to erWin online and did my research there before coming here to briskoda.net. I even combined all the downloaded pdfs into one. The whole thing doesn't tell me anything. It's just a vast, seemingly endless list of oil brands and their specs. It's nothing specific for me.
Back to my question: your reply didn't really answer my question which was: what is the connection/interdependence between VW xxx.00 and SAE xW-xx, if any at all?
I see it 2 ways:
1) VW specifies I need to purchase VW 504 00 oil; then I look for various viscosities under this standard (e.g. 5W-30; 0W-20, etc); and then I just select either one of them.
2) VW specifies I need to purchase SAE 5W-30 under VW 504 00 standard; and then I look for various brands which comply to both criteria simultaneously.
I'm trying my best to make myself clear, though I'm not sure I'm successful at all.