Guys, if you haven't been to Castrol Deutschland or Castrol Sverige (Sweden) lately, you should. Take a look at the specs for RS 0W-40 (D) (they have improved them) and especially Edge (S) 0W-40. Castrol is decidedly NOT resting on current formulations but is pressing on with some REALLY GOOD STUFF! One thing you will notice with the new generation oils (even the long drain oils) (I saw this with ELF as well) is that the TBN is a lot lower than you may be used to; either it depletes slower or with the new low SAPS applications you don't need as high a starting TBN.