Can I use premium gas in my Hyundai Sonata hybrid vehicle?
You can use premium, but if the manufacturer doesn't specify that it's required and the engine has no knock, why bother?
http://www.hyundaisonatamanual.com/sonata-3-fuel_requirements.html Pasted from owners manual: Introduction / Fuel requirements Your new vehicle is designed to use only unleaded fuel having a pump octane number ((R+M)/2) of 87 (Research Octane Number 91) or higher. Other words regular 87 is fine but they used premium 91 during engine testing
engine may run hotter may start over heating or may not
Ethenol free high test is why,. All of our engines are being affected by Ethenol in our gas is why I'm using it
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