Sounding like a Blonde moment, but my oil light came on inbetween servicing, however, i ordered Castrol Magnatec 5W30 (As the 'Find your oil' search quoted 5W30 as the correct oil for the vehicle, an 07 A6 2.0Tdi 140). Anyway, having looked at the castrol Website, 'Castrol Edge' is being quoted as the oil i should have bought as its the right recommendation for VW/Audi under VW505.01 reference.
Can someone enlighten me before i open the Magnatex? Its easily exchanged - Better safe than sorry!