Good Morning! Only one week untill i take the long trip up to R-tech and damn am i excited Going to do a full service before i head up, wanted to ask what oil most people are using? Im currently using Castrol GTX 5w 40 part synthetic. Can i use a fully synthetic oil? And is there anyone in the hertfordshire area who has VAGCOM who wouldnt mind checking my car before i go up. Will pay in beer or cash Thanks!