See also:

Fuel requirements
unleaded fuel having a pump octane number ((R+M)/2) of 87 (Research Octane Number 91) or higher. Your new vehicle is designed to obtain maximum performance with UNLEADED FUEL, as well as minimize ...

Overheating
If your temperature gauge indicates overheating, if you experience a loss of power, or if you hear a loud knocking or pinging noise, the engine has probably overheated. Should any of these symptom ...

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 ...