I've had my I-4 Terrain FWD for 2 mos. now and 3K miles. Back and forth to work at 60-70MPH on the interstate yields excellent mileage--29-33 MPG. Around town for extended periods has average about 23-25 MPG. But if go for a longer ride, like yesterday for example, interstate only and at 75-80 MPH, the I4 only managed 24.7 MPG for a 340 mile round trip. Flat, little wind, and not much traffic to deal with. Temps in the lower 80's. The mileage drops like a rock when the speedo gets above 70MPH---at least for me--and I'm trying to keep a constant speed. The instant MPG on DIC shows pretty much what I get on trip MPG readout. Either I got to get a lighter foot or forget what mileage I'm getting.