My Lounge 500c has a little over 2,000 miles on it and I took my first highway drive yesterday. I filled up just before the on ramp and drove 125 miles. As I was exiting and checked my average mpg and I was shocked to see 42.6 MPG. The outside temperature was 92 degrees so the air-conditioning was running full blast and did I mention that my 500c is an automatic. My speed was right at 70 miles per hour. I would not have thought that an automatic would get that kind of MPG. Needless to say, I am a happy camper.