I noticed once again the radiator overflow is pretty much empty. Is this a problem? I see a MAX and a MIN, but I don't know where it means the MIN is supposed to be. If I overfilled it before, did the extra gas out? Are you supposed to see it at a certain level, or does everyone else have a nearly empty overflow? I don't want it to overheat one time that we're out and all that. Thanks for any insights, I have no comparison out here for Volvo.