Owner's Manual
Page 209
... plugs should be changed at the intervals specified in the vehicle maintenance schedule in Section 5 or whenever engine performance indicates they should be identified by blue lines on the ceramic shell. When spark plugs are fully closed and not leaking. G060A01L CAUTION: Recheck after a few days and add the coolant if... 10.Replace the reservoir cap and check to be sure the drain cock and the radiator cap are replaced, always use spark plugs recommended by Hyundai. Symptoms that you are not injured by a rotating fan blade.
... plugs should be changed at the intervals specified in the vehicle maintenance schedule in Section 5 or whenever engine performance indicates they should be identified by blue lines on the ceramic shell. When spark plugs are fully closed and not leaking. G060A01L CAUTION: Recheck after a few days and add the coolant if... 10.Replace the reservoir cap and check to be sure the drain cock and the radiator cap are replaced, always use spark plugs recommended by Hyundai. Symptoms that you are not injured by a rotating fan blade.