See also:

Stop and Go available for two engines
By the end of 2010, Kia will be offering its fuel-stretching ISG (Intelligent Stop and Go) system as an option on both the 1.7 diesel and 1.6 GDI engine. ISG automatically switches the engine off ...

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 ...

FAST FACTS
1. The Optima makes 200-hp from a standard direct-injection 2.4L 4-cylinder, while achieving best-in-class 24/35-mpg (city/hwy) fuel economy. 2. Optional class exclusive features include a panoram ...