My car is due a service, or basically, an oil change. I've been quoted the following: Independent VAG specialist - £155 using longlife oil. Audi - £149 for a "segment 2" oil change (seen here under Affordable servicing, Interim Service --> Affordable servicing < Servicing with Audi < Owners area < Audi UK) Audi - £238 using longlife oil. What oil is actually used by Audi when doing a segment 2 oil change? And is it better to use the longlife oil?