Buick Regal: Recommended Fuel - Object Detection Systems - Driving and Operating - Buick Regal Owners ManualBuick Regal: Recommended Fuel

If the vehicle has a 2.4L L4 engine (VIN Code C), use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise, commonly referred to as spark knock, might be heard when driving. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service.

If the vehicle has the 2.0L L4 engine (VIN Code V), use premium unleaded gasoline with a posted octane rating of 91 or higher.

You can also use regular unleaded gasoline rated at 87 octane or higher, but the vehicle's acceleration could be slightly reduced, and a slight audible knocking noise, commonly referred to as spark knock, might be heard. If the octane is less than 87, a heavy knocking noise might be heard when driving.

If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. Otherwise, you could damage the engine. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service.

    Fuel
    Use of the recommended fuel is an important part of the proper maintenance of this vehicle. To help keep the engine clean and maintain optimum vehicle performance, we recommend the use of gasoline adv ...

    Gasoline Specifications (U.S. and Canada Only)
    At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB-3.5 or 3.511 in Canada. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl ...

    See also:

    Audio system types
    Without navigation system and Display Audio system With Display Audio system Owners of models equipped with a Display Audio system should refer to the “Display Audio System Owner's Manual” ...

    Head Restraints
    The vehicle's front seats have adjustable head restraints in the outboard seating positions. The vehicle's rear seats have adjustable head restraints in the outboard seating positions. WARNING W ...

    Air Conditioner Maintenance
    For best possible performance, your air conditioner should be checked and serviced by an authorized dealer at the start of each warm season. This service should include cleaning of the condenser ...