I have a 2008 CX9 with 116 K, just bought it a couple months ago, and really don't know the service history. When I pulled the drain plug the oil was very dark, but did not smell burnt. When you pull the plug you can only get around 3 1/2 quarts out, so what I decided to do was drain, and fill with new oil. Drive for a week, and then do the whole thing over again. So far I have drained and refilled 3 times, and I have enough oil to do it one last time. I figure after 4 changes it should be good to go. Also the tranny is shifting just fine, so change the oil.