I have a 2010 Journey with the 3.5L V6 FWD , averaging 13.9-14.2 litres per 100KM or appoximately 16 MPG in the city, lots of hills, and very short drives without giving the car a chance to fully warm up. (yeah, I know, not great for the SUV, but I drive it to the bus stop to go to work, to avoid the $30.00 a day parking)
I haven't had a good chance to test the longer distance highway mileage, but from what I have seen, is about 10L per 100 KM.