cool, after much searching and investigation i can see that any engine oil graded 505.01 or above is suitable for PD engines...am i correct in saying this or is 505.01 especially designed just for PD?
now what i don't understand is, if longlife oils are more suitable for longer service periods but burn quicker, why would SEAT recommend this? and the fact they mentioned "it's for performance engines" leads me to believe they do really try and shaft people (as they have tried on me recently)
all i can say is, once my warranty is up i WON'T be going back to SEAT for servicing