Originally Posted by
warped_foobie
You need to use a 504/507 VW approved oil on your mark 6. Because these engines are direct injection, they tend to soot up the intake. These oils meet certain standards set by vw to try and eliminate/prevent this.
Buy the stuff from the dealer, you know it's right and it's "castrol professional" - it's different to the stuff at the autoshops, VW import it themselves as a spare part. If you don't like that, there is oils from liqui-moly (spelling) and also penrite that are approved as well. Both sold at super-crap and autobarn etc.
Do a search - oils has been done to death here and other VW forums :)