2020-2025 Subaru Outback SUV Starting and Operating -> Fuel Requirements User Manual
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Starting and Operating -> Fuel Requirements for Your Subaru Outback SUV Sixth Generation (2020-2025)

(350,1)
北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
7-1. Fuel
s07aa
CAUTION
. Use of a fuel which is low in
quality or use of an inappropriate
fuel additive may cause damage
to the engine and/or fuel system.
. Some gas stations, particularly
those in high altitude areas, offer
fuels posted as regular octane
gasoline with an octane rating
below 87 AKI (90 RON). Use of
those fuels are not recom-
mended.
& Fuel Requirements
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The engine is designed to operate using
unleaded gasoline with an octane rating
of 87 AKI (90 RON) or higher.
NOTE
When using the 2.4 L turbo engine
model to tow a trailer, SUBARU recom-
mends using unleaded gasoline with an
octane rating of 91 AKI (95 RON) or
higher to reduce the risk of engine
overheat.
! Fuel octane rating
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Using a gasoline with a lower octane rating
can cause persistent and heavy knocking,
which can damage the engine. Do not be
concerned if your vehicle sometimes
knocks lightly when you drive up a hill or
when you accelerate. See your dealer or a
qualified service technician if you use a
fuel with the specified octane rating and
your vehicle knocks heavily or persistently.
! RON
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This octane rating is the Research Octane
Number.
! AKI
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This octane rating is the average of the
Research Octane and Motor Octane num-
bers and is commonly referred to as the
Anti Knock Index (AKI).
! Unleaded gasoline
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The neck of the fuel filler pipe is designed
to accept only an unleaded gasoline filler
nozzle. Under no circumstances should
leaded gasoline be used because it will
damage the emission control system and
may impair driveability and fuel economy.
! Reformulated gasoline
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SUBARU supports the use of reformulated
gasoline when available. Reformulated
gasoline has been blended to burn more
cleanly and reduce vehicle emissions.
! MMT
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Some gasoline contains an octane-enhan-
cing additive called MMT (Methylcyclo-
pentadienyl Manganese Tricarbonyl). If
you use such fuels, your emission control
system performance may deteriorate and
the CHECK ENGINE warning light/mal-
function indicator light may turn on. If this
happens, return to your authorized
SUBARU Dealer for service. If it is
determined that the condition is caused
by the type of fuel used, repairs may not be
covered by your warranty.
! Gasoline for cleaner air (2.4 L mod-
els)
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Your use of gasoline with detergent ad-
ditives will help prevent deposits from
forming in your engine and fuel system.
This helps keep your engine in tune and
your emission control system working
properly, and is a way of doing your part
for cleaner air. If you continuously use a
high quality fuel with the proper detergent
and other additives, you should never
need to add any fuel system cleaning
agents to your fuel tank.
Many gasolines are now blended with
materials called oxygenates. Use of these
fuels can also help keep the air cleaner.
Oxygenated blend fuels, such as ethanol
Fuel
348
(351,1)
北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
(ethyl or grain alcohol) may be used in your
vehicle, but should contain no more than
15% ethanol for the proper operation of
your SUBARU.
Do not use any gasoline that contains
more than 15% ethanol, including from any
pump labeled E30, E50 or E85 (which are
only some examples of fuel containing
more than 15% ethanol).
In addition, some gasoline suppliers are
now producing reformulated gasolines,
which are designed to reduce vehicle
emissions. SUBARU approves the use of
reformulated gasoline.
If you are not sure what the fuel contains,
you should ask your service station op-
erators if their gasolines contain deter-
gents and oxygenates and if they have
been reformulated to reduce vehicle emis-
sions.
As additional guidance, only use fuels
suited for your vehicle as explained in the
following description.
. Fuel should be unleaded and have an
octane rating no lower than that specified
in this manual.
. Methanol (methyl or wood alcohol) is
sometimes mixed with unleaded gasoline.
Methanol can be used in your vehicle
ONLY if it does not exceed 5% of the fuel
mixture AND if it is accompanied by
sufficient quantities of the proper cosol-
vents and corrosion inhibitors required to
prevent damage to the fuel system. Do not
use fuel containing methanol EXCEPT
under these conditions.
. If undesirable driveability problems are
experienced and you suspect they may be
fuel related, try a different brand of gaso-
line before seeking service at your
SUBARU dealer.
. Fuel system damage or driveability
problems which result from the use of
improper fuel are not covered under the
SUBARU Limited Warranty.
! Gasoline for cleaner air (2.5 L mod-
els)
s07aa0107
Your use of gasoline with detergent ad-
ditives will help prevent deposits from
forming in your engine and fuel system.
This helps keep your engine in tune and
your emission control system working
properly, and is a way of doing your part
for cleaner air. If you continuously use a
high quality fuel with the proper detergent
and other additives, you should never
need to add any fuel system cleaning
agents to your fuel tank.
Many gasolines are now blended with
materials called oxygenates. Use of these
fuels can also help keep the air cleaner.
Oxygenated blend fuels, such as ethanol
(ethyl or grain alcohol) may be used in your
vehicle, but should contain no more than
10% ethanol for the proper operation of
your SUBARU.
Do not use any gasoline that contains
more than 10% ethanol, including from any
pump labeled E15, E30, E50 or E85 (which
are only some examples of fuel containing
more than 10% ethanol).
In addition, some gasoline suppliers are
now producing reformulated gasolines,
which are designed to reduce vehicle
emissions. SUBARU approves the use of
reformulated gasoline.
If you are not sure what the fuel contains,
you should ask your service station op-
erators if their gasolines contain deter-
gents and oxygenates and if they have
been reformulated to reduce vehicle emis-
sions.
As additional guidance, only use fuels
suited for your vehicle as explained in the
following.
. Fuel should be unleaded and have an
octane rating no lower than that specified
in this manual.
. Methanol (methyl or wood alcohol) is
sometimes mixed with unleaded gasoline.
Methanol can be used in your vehicle
– CONTINUED –
Fuel
349
7
Starting and Operating
(352,1)
北米Model "A2620BE-A" EDITED: 2022/ 4/ 25
ONLY if it does not exceed 5% of the fuel
mixture AND if it is accompanied by
sufficient quantities of the proper cosol-
vents and corrosion inhibitors required to
prevent damage to the fuel system. Do not
use fuel containing methanol EXCEPT
under these conditions.
. If undesirable driveability problems are
experienced and you suspect they may be
fuel related, try a different brand of gaso-
line before seeking service at your
SUBARU dealer.
. Fuel system damage or driveability
problems which result from the use of
improper fuel are not covered under the
SUBARU Limited Warranty.
& Fuel Filler Lid and Cap
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! Locations of the fuel filler lid
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! Refueling
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Only one person should be involved in
refueling. Do not allow others to approach
the area of the vehicle near the fuel filler
pipe while refueling is in progress.
Be sure to observe any other precautions
that are posted at the service station.
1. Stop the vehicle, turn the ignition
switch to the “LOCK”/ “OFF” position and
turn off all the other electrical components.
2. To unlock the fuel filler lid, perform one
of the operations below.
– Press the “
” button on the key fob.
– Press the unlock side of the power
door locking switch.
3. Push the rear side of the fuel filler lid.
4. The fuel filler lid opens automatically.
Open it further by hand.
WARNING
Before opening the fuel filler cap,
first touch the vehicle body or a
metal portion of the fuel pump or
similar object to discharge any sta-
tic electricity that may be present on
your body. If your body is carrying
an electrostatic charge, there is a
possibility that an electric spark
could ignite the fuel, which could
burn you. To avoid acquiring a new
static electric charge, do not get
back into the vehicle while refueling
is in progress.
Fuel
350

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