See also:

Explanation of scheduled maintenance items
Engine oil and filter The engine oil and filter should be changed at the intervals specified in the maintenance schedule. If the vehicle is being driven in severe conditions, more frequent oil an ...

Engine cooling system
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 ...

DRIVER-ORIENTED INTERIOR DESIGN
With the 2011 Optima, Kia has made big strides forward in the use of cabin materials, while interior layout and design are also strong points. Much like how the exterior conveys a dramatic message ...