i own a vw vento tdi highline for the past 20 months and have clocked 36750 kms till date. i have never topped the oil. just gave the car for a check up after say 7000kms. its advisable to give the car for a check up as they frequently update the softwares ( as told me by vw ass
) where do you get the airfilter cleaned every month ? i don't think its needed unless you drive a lot in a very dusty envirnment.