I have a 2011 USA Journey Mainstreet, no AWD and new pentastar V6. When I was city driving more, I was getting about 16-17 mpg. Now I'm in the country a little bit, I'm about 22 mpg. I had a 06 Chevy malibu V6 and that thing got same numbers maybe slightly better. I think this is good gas milage for a crossover. I don't think Acadias get that good. I'm at about 2050 miles, so hopefully the more I put on the better. Things are still tight and bearings need to loosen up. All you brand new owners, lets be patient and see if we do better with more milage. As it says in the manual "high rpms are desirable" lol.