Just had my A4 Tdi 130 PD serviced using Comma Prolife 5w 30 long Life engine oil which, according to Comma is made specifically for VW / Audi, and complies with VW 506 01 spec. Took the car to an Audi specialist to have the service indicator reset to long life and he says the oil is not suitable and would never use it for a standard service let alone a long life one. I am now concerned if this oil is okay or not!. Should I ignore his comments or get it changed toot sweet!