Hi all, i know this has been discussed numeurous times, but for some reason today i keep getting soory nothing found when using the search function. I own a 54 plate A3 2.0L TDI 140 sport, with 120k on the clock. It recommends using 5w30 or 504vw - 507vw oil. I can get 5w40 for the same price and used this in my S3, even though it recommended 5w30 for that. What would be the best one to go for? And i can get 5w30 castrol magnetic really cheap, never tried it, so would it be ok in my car? Thanks in advance.