Buick Encore: Top Tier Fuel
GM recommends the use of TOP TIER Detergent Gasoline to keep the engine clean, reduce engine deposits, and maintain optimal vehicle performance. Look for the TOP TIER Logo or see www.toptiergas.com for a list of TOP TIER Detergent Gasoline marketers and applicable countries.
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Recommended Fuel
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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.
Do not use any fuel labeled E85 or FlexFuel. Do not use gasoline with ethanol levels greater than 15% by volume.
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
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.
TOP TIER Detergent Gasoline and ACDelco Fuel System Treatment Plus−Gasoline will help keep your vehicle's engine fuel deposit free and performing optimally.
READ NEXT:
Filling the Tank (Capless Fuel Fill)
An arrow on the fuel gauge
indicates which side of the vehicle
the fuel door is on. See Fuel Gauge
Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
Follow these guidel
Filling the Tank (Capped Fuel Fill)
An arrow on the fuel gauge
indicates which side of the vehicle
the fuel door is on. See Fuel Gauge
Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
Follow these guideli
Conversions and Add-Ons
Add-On Electrical
Equipment
Warning
The Data Link Connector (DLC) is
used for vehicle service and
Emission Inspection/Maintenance
testing. See Malfunction Indicator
Lamp (Check Engine Light -
Capless)
SEE MORE:
Battery disconnect warning
WARNING: Unless directed otherwise, the ignition and start switch
must be in the
OFF or LOCK position, and all electrical loads must be OFF before
servicing any electrical component. Disconnect the negative battery cable
to prevent an electrical spark should a tool or equipment come in contact
with
Head Restraint Removal and Reinstallation
The rear outboard head restraints
can be removed if they interfere with
the proper installation of the child
restraint.
To remove the head restraint:
Partially fold the seatback
forward. See Rear Seats
Press both buttons on the head
restraint posts at the same
time, and pull up on the hea
