See also:

Additional Horsepower
The 2.4-liter 161-horsepower 4-cylinder engine has gained 23 horsepower from the early-2006 model and provides good acceleration below 60 mph—but average performance above that speed. The 2.7-li ...

IS BIGGER BETTER?
While we’d certainly argue that when it comes to cars bigger isn’t always better, the wider and longer Optima is now in line with its main competitors delivering added interior space. Rear sea ...

Door locks
Operating door locks from outside the vehicle • Turn the key clockwise to unlock and counterclockwise to lock. • If you lock the driver’s door with a key, all vehicle doors will lock auto ...