See also:

Fuel requirements
Gasoline engine (unleaded) Your new Kia vehicle is designed to use only unleaded fuel with a minimum Octane Rating of 87 Anti-Knock Index (AKI). NOTICE NEVER USE LEADED FUEL. The use of leaded ...

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 ...

Driving your vehicle
Ignition switch Starting the engine Manual transaxle Automatic transaxle Four wheel drive (4WD) Brake system Steering wheel Cruise control system Electronic stability control Instrument clust ...