Do Not Use Methanol
Fuels containing methanol (wood alcohol) should not be used in your Hyundai. This type of fuel can reduce vehicle performance and damage components of the fuel system.
CAUTION:
Your Hyundai's New Vehicle Limited Warranty may not cover damage to the fuel system and any performance problems that are caused by the use of fuels containing methanol.
See also:
Performance
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General Checks
These are the regular checks you should perform when you drive your Hyundai or
you fill the fuel tank. A list of these items will be found on page 6-4. ...
Use high quality ethylene glycol coolant
Your vehicle is delivered with high quality ethylene glycol coolant in the cooling
system. It is the only type of coolant that should be used because it helps prevent
corrosion in the cooling syst ...