See also:

Specifications
The specifications given here are for general information only. Although this information was accurate at the time of printing, Kia reserves the right to change its vehicles or their specifications ...

Engine coolant
The high-pressure cooling system has a reservoir filled with year-round antifreeze coolant. The reservoir is filled at the factory. Check the antifreeze protection and coolant level at least once ...

Roomy New Interior
However, the Optima's quiet new interior is more upscale and will accommodate four tall adults, or five in a pinch. Front seats are supportive, and the rear-seat area is impressively roomy—alt ...