Gasoline Octane

Use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, you may notice an audible knocking noise when you drive, commonly referred to as spark knock. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible.

If you are using gasoline rated at 87 octane or higher and you hear heavy knocking, your engine needs service.

    See also:

    Sensing System for Passenger Airbag
    The passenger sensing system will turn off the right front passenger frontal airbag and seat-mounted side impact airbag under certain conditions. The driver airbags and roof-rail airbags are not ...

    Intelligent personal technologies
    The contemporary atmosphere of the cabin includes the digital connectivity and personal technology offered in the new Buick LaCrosse. That includes features such as in-dash navigation, Bluetooth c ...

    Towing a Trailer
    WARNING: The driver can lose control when pulling a trailer if the correct equipment is not used or the vehicle is not driven properly. For example, if the trailer is too heavy, the brakes may ...