I just bought a 2012 civic ex sedan. I am very impressed with the gas milage I'm getting. I averaged 54.1 mpg on my first tank of gas. I do 98% highway driving. I am typically cruising at 60 mph. If i reset my trip meter while on expressway only....i can average 61mpg. I think Honda under estimated the mpg on this vehicle. My second tank of gas I drove 50% hwy and 50% city. Average mpg was 38.8.