See also:

Convenience
The Kia Rio's fuel tank will need to be replenished more often than the unit in the average sedan. ...

Driving tips
Fuel requirements Emission control system Before driving Suggestions for economical operation Special driving conditions Trailer towing Overloading Label information ...

SOLID RIDE WITH POWER TO SPARE AND EXCELLENT FUEL ECONOMY
In terms of driving characteristics, the Optima is very much in keeping with the Hyundai Sonata, which shares the same platform. The cabin is quiet and the drive is smooth, with the Optima feeling ...