My Tiguan spec. VW502.00 I do not use Castrol 0W30 bcs. it is VW502.00, as that spec. is not particularly stringent, but bcs. it is MB229.5 and generally good oil.Is the VW508.00/509.00 requirement the only time you've broken from what's required by VW/Audi in a VAG vehicle? I know this is the case with lot's of guys on the VAG boards. Many of them are using 504/507 or 505, 502. Even some dexos2 C3 converts.
Next fill is M1 ESP 0W30, 504/507.