I have a 2009 Saturn. Ever since we have owned this suv the oil gets really black a few weeks after an oil change. I am always on time, if not early on my oil changes. I have had several attendants tell me the oil is to dark, and that something must be wrong. So... I took it to my gm retailer and had them check it out. They came back with nothing that has satisfied this issue. They did an oil change, and " misplaced" my sample I requested. I was going to have the oil tested at a lab. Days later they claim to have found the sample, I will wait now until the next oil change I have. Please help! Very confused and frustrated.