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:

    Bottle Holder
    Bottle holders are on the inside of the front doors. CAUTION: Do not use the bottle holders for containers without caps. The contents may spill when the door is opened or closed. ...

    Manual Transmission (if so equipped)
    ● Always tow with the manual transmission in Neutral. ● After towing 500 miles (805 km), start and idle the engine with the transmission in Neutral for two minutes. Failure to idle the ...

    Keyless Entry System
    This system remotely locks and unlocks the doors and opens the trunk lid, and opens the power windows and the moonroof. It can also help you signal for attention. Operating the theft-deterrent sys ...