Engine Oil Additives/Engine Oil Flushes

Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark are all that is needed for good performance and engine protection.

Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.

    See also:

    Roadside Assistance Program
    U.S.: 1-800-252-1112 TTY Users: 1-888-889-2438 Canada: 1-800-268-6800 As the owner of a new Buick, you are automatically enrolled in the Roadside Assistance program. See Roadside Assistance Pr ...

    Unlock Doors
    Press the customization button until UNLOCK DOORS: IN PARK appears in the display. To select your preference for automatic unlocking, press the select button while UNLOCK DOORS: IN PARK is dis ...

    CHANGE ENGINE OIL SOON
    This message displays when the engine oil needs to be changed. When you change the engine oil, be sure to reset the Oil Life System. See Engine Oil Life System and Driver Information Center (D ...