I just sent the gf off in my GTI in a bit of a rush and checked the oil before she went. It was almost at the bottom of the marker, so I topped up. But in my rush must have added too much as it now went past the middle bit into the separated off top bit, which you're not meant to go into!
Will the car run fine like this? I don't think I'll have gone too far over the top bit, as I only had half of a 1ltr bottle left and left a little in the bottle too.