Hi all,I need some advise. I drive a 523 E60, 2006 model. I got the car last year from second hand dealer with full service record from AB. The car requires 1 litre of engine oil top up at every 8000km. I have sent the car to AB for check up and they gave assurance that the car is in good conditions and it's within acceptable tolerance for the car to consume up to 1 litre for every 8000km. I'm just wondering if other have this same problem.Appreciate any feedback from you guys out there.