See also:

Use Unleaded Gasoline
Unleaded gasoline with a Pump Octane Rating of 87 (Research Octane Number 91) or higher must be used in your Hyundai. WARNING: o Do not "top off" after the nozzle automatically shuts o ...

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 a ...

2011 Hyundai Sonata Hybrid review
In the world of hybrids, there are two schools of thought: You can buy a Toyota Prius — a hard-core, 50-mpg hybrid with funky styling and a utilitarian interior — or you can pay more and get less- ...