We bought the Civic EX with the 1.8 liter engine when fuel prices were approaching $4.00 per gallon. We recently averaged 39 mpg over a 2200 mile trip much of it through mountainous terrain. My best mileage was at 45 mpg over a newly paved interstate. The smoothness of the road helps in delivering good mileage. And driving at the posted interstate speed of 70 MPH does not diminish the mpg. The Civic averages about 28 mpg in town.
Holds the road very well in curves and during turns. Very aerodynamic! Very comfortable suspension. Adjustable steering wheel pushes in and pulls out as well as up and down.
My only complaint is that the EX trim should come standard with a lumbar control for the driver's seat. Climbing into the driver's seat is like that of a race car. I wish it were easier to get into the seat.