Howdy, because i'm a grade A moron i've been running my E39 528i low on oil for several hundred kilometers. We're talking about 2 liters below the full oil capacity here. I know i only have myself to blame but i'm kinda worried about wether or not this has damaged the engine in any way. I've never noticed any strange sounds and overall the engine has always been and still is running great. Pulls good and idle's very smooth and quiet. Is there anyway to know if i have damaged my engine. Really hoping that i haven't caused like 100k kilometers of extra wear on the engine or something.