I can vouch for the 40MPG highway number. My 2011 GLS automatic sedan has gotten this on the highway. In fact, I can take my car from Lawrenceville GA (i live)to Homer Glen IL (parents) and only have to fill up once, just short of the 400 mile mark in Kentucky. Prob would make it to 400 miles, it was not completly empty when I filled up. The computer on the dash does show between 38-41 MPG while on and off cruise control, driving about 70-75mph. And that was on three seperate trips. once with four people and full trunk of baggage, once with 5 people, light baggage, and once with me, my shih-tzu, and the back seat and trunk full of bags, boxes and other junk. Still gets the full MPG's!