Buick Encore: Fuel / Prohibited Fuels

Buick Encore 2020-2023 Owner's Manual / Driving and Operating / Fuel / Prohibited Fuels

Caution

Do not use fuels with any of the following conditions; doing so may damage the vehicle and void its warranty:

  • For vehicles that are not FlexFuel, fuel labeled greater than 15% ethanol by volume, such as mid-level ethanol blends (16–50% ethanol), E85, or FlexFuel.
  • Fuel with any amount of methanol, methylal, ferrocene, and aniline. These fuels can corrode metal fuel system parts or damage plastic and rubber parts.
  • Fuel containing metals such as methylcyclopentadienyl manganese tricarbonyl (MMT), which can damage the emissions control system and spark plugs.
  • Fuel with a posted octane rating of less than the recommended fuel. Using this fuel will lower fuel economy and performance, and may decrease the life of the emissions catalyst.

Fuels in Foreign Countries

The U.S., Canada, and Mexico post fuel octane ratings in anti-knock index (AKI). For fuel not to use in a foreign country, see Prohibited Fuels.

    Recommended Fuel

    Use regular unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 87 — (R+M)/2 — or higher. Do not use gasoline with a posted octane rating of less than 87, as this may cause engine knock and will lower fuel economy...

    Fuel Additives

    TOP TIER Detergent Gasoline is highly recommended for use with your vehicle. If your country does not have TOP TIER Detergent Gasoline, add ACDelco Fuel System Treatment Plus−Gasoline to the vehicle’s gasoline fuel tank at every oil change or 15 000 km (9,000 mi), whichever occurs first...

    Other information:

    Buick Encore 2020-2023 Owner's Manual: Roadside Assistance Program


    For U.S.-purchased vehicles, call 1-800-252-1112; (Text Telephone (TTY): 1-888-889-2438). For Canadian-purchased vehicles, call 1-800-268-6800. Service is available 24 hours a day, 365 days a year. Calling for Assistance When calling Roadside Assistance, have the following information ready: Your name, home address, and home telephone number Telephone number of your location Location of the vehicle Model, year, color, and license plate number of the vehicle Odometer reading, Vehicle Identification Number (VIN), and delivery date of the vehicle Description of the problem Coverage Services are provided for the duration of the vehicle’s powertrain warranty...

    Buick Encore 2020-2023 Owner's Manual: Rear Window Wiper/Washer


    The rear wiper/washer controls are on the end of the windshield wiper lever. ON : Press the upper portion of the button for continuous rear window wipes. OFF : The rear wiper turns off when the button is returned to the middle position. INT : Press the lower portion of the button for rear intermittent wipes...

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    Buick Encore. Instrument Cluster

    Tachometer Fuel Gauge Engine Coolant Temperature Gauge Speedometer Driver Information Center (DIC)

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