Hyundai Sonata: Spark plugs - Explanation of scheduled maintenance items - Maintenance - Hyundai Sonata Owners ManualHyundai Sonata: Spark plugs

Make sure to install new spark plugs of the correct heat range.

    Air cleaner filter
    A Genuine HYUNDAI air cleaner filter is recommended when the filter is replaced. ...

    Valve clearance
    Inspect excessive valve noise and/or engine vibration and adjust if necessary. An authorized HYUNDAI dealer should perform the operation. ...

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    Closing
    WARNING To prevent possible personal injury, always keep hands and fingers away from the trunk/cargo compartment opening when closing the trunk lid/tailgate. Be especially careful when sm ...

    Octane rating tips
    Using unleaded gasoline with an octane rating lower than recommended can cause persistent, heavy “spark knock.” (“Spark knock” is a metallic rapping noise.) If severe, this can lead to eng ...

    Fuel E85 (85% Ethanol)
    Vehicles that have a FlexFuel badge and a yellow fuel cap can use either unleaded gasoline or ethanol fuel containing up to 85% ethanol (E85). For all other vehicles, use only the unleaded gasoline d ...