I got the same problem on oil consumption, I brought my Rouge 09 to the dealership when I heard a ticking sound from my engine on 7K. They said that engine is low in oil. They top it up and found last week that at 8.7K it went down to a little above of half of oil dip stick. I also found a black carbon on my tail pipe. I just brought my Rougue to dealership today. Ill post the result of their findings.