I went on a vacation to Florida and got back last Saturday. It's a 16 hour drive one way from OKC. We have the 3.6 V6 AKA pentastar in our durango. We had 6 grown adults plus all of our luggage and crap loading the car down. We averaged 25.2 MPG the whole trip including driving around in Florida all week. And I held 75 MPH most of the way, so I wasn't trying to baby it. That's pretty decent fuel economy from a boring V6 that makes 295 HP.