New member, long time browser.
I just picked up a Q7 TDI and am very new to diesels.
The dealership I bought the Q7 from (Chevy dealer) used Mobil 1 Delvac 5w-40 before delivery for an oil change. I am concerned because of the ash content. It's at 1.0 when I know most VW/Audi 507 spec oils...
