What About Gasohol?
Gasohol (a mixture of 90% unleaded gasoline and 10% ethanol or grain alcohol) may be used in your Hyundai. However, if your engine develops driveability problems, the use of 100% unleaded gasoline is recommended. Fuels with unspecified quantities of alcohol, or alcohols other than ethanol, should not be used.
See also:
Do not use methanol
Fuels containing methanol (wood alcohol) should not be used in your vehicle.
This type of fuel can reduce vehicle performance and damage components of the fuel
system. ...
2011 Hyundai Sonata review
I've gotten tired of writing about the next good Hyundai.
And according to the late night profanity-laced messages left on my voice
mail, so have Detroit readers.
So let's just stop acting surpr ...
Check Fuel Filler Cap Warning Light
This warning light indicates the fuel filler cap is not tight securely. Always
make sure that the fuel filler cap is tight. ...