Looks like I was wrong about the estimated mileage that Dodge put on their website about the Charger SE model. We got 27.67 mpg on our trip to Vegas (282.2 miles / 10.2 gallons). That was going 70-75 mph the whole way, which if it had been 65-70 it probably would have been better. We filled up before we left Vegas to come back home and we haven’t filled it up since we got back this afternoon, but it looks like it’s going to be about the same mileage for the return trip too.
One thing though that I should mention. The night before we left for Vegas we went to the airport to pick up my Mother-in-law, which is about 60 miles round trip. We had filled up that day, then we filled up again the next day just before we left for Vegas. The mpg we got from just driving to the airport and back was less that 17mpg! That was with two extra adults and their luggage in the car. What a difference the extra weight can make.