I drove home in Eco mode from Princeton, NJ to Phillipsburg, NJ - a trip of exactly 50 miles. I got 65.1 mpg for the trip. It's mostly 50 MPH winding county roads. I used ACC for most of the trip. So far, I've gone about 300 miles on this tank of gas, and it's still half full. After 300 miles in my old '99 Civic, I'd need to fill it. I continue to be amazed.