So today, my family and I went to Carlsbad Caverns in New Mexico and it was a 4 hour drive there and back. I was expecting to fill up there for the way home, but I was wrong. We went 350 miles on about 3/4 of a tank (according to the gauge) when i filled up on the way home. I think I could have gotten back without filling at all but i figured better to be safe than sorry. Put gas in and only got 17 gallons in. So yeah, I calculated it and I got 20.1 mpg on a 2wd se cc with bt and 5 people in it. Only thing I can think of is the slower speed limits here. Just thought I'd share.