Hello, my buddy (Kfz Meister VW Audi) just had an oil change in the garage/workshop. I wrongly told him that with my D5 5 7 liter oil including filter changes are planned. Now I, for safety reasons, looked again and noticed that it had to be 6.5 liters. My friend, the master, said that it was still completely ok and I had nothing to worry about. Can this work?