Kia Optima 2015 Automatic Gasoline mileage: 300 KM or more Optima 2015, color changed from gray to navy. Engine recently changed and the car has been fully serviced from bumper to bumper. There is a light scratch mark on the bumper and the fender. Mileage is 400. The new engine has not run 50,000 miles and is in good condition. Engine is 2.4.