Hey all, I know very little about cars which will become obvious in the next few sentences I topped up my power steering fluid 2 days ago as it was pretty low, actually really low, and I checked it today and the level was fine, still at the level when I topped it up but the color of it was a dark greyish almost black. Could this have been because the last bit that was left in there was old? Or is it more serious? Do I need to drain my reservoir and refill it? Thanks for any help and sorry about the ultra noobish question.