See also:

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 ...

POWER AND FUEL-ECONOMY ARE UP TO PAR
That description might have you thinking the Optima has all sorts of power. True, the upgraded 2.4-liter four-cylinder gets added power for ’09 with 175hp and 169 ft-lbs of torque, but it’s no ...

Suggestions for economical operation
Your vehicle's fuel economy depends mainly on your style of driving, where you drive and when you drive. Each of these factors affects how many kilometers (miles) you can get from liter (a gallon ...