octane SUBARU BAJA 2003 1.G Owners Manual

7-2
FuelCAUTION
Use of a fuel which is low in quality or use of an inappropriate fuel additive may cause engine damage.
Fuel requirements
The 2.5 Liter engine is designed to operate using unleaded gasoline with
an octane rating of 87 AKI or higher.
Fuel octane rating
This octane rating is the average of the Research Octane and Motor
Octane numbers and is commonly referred to as the Anti Knock Index(AKI).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 techni-
cian if you use a fuel with the specified octane rating and your vehicle
knocks heavily or persistently. Unleaded gasoline
The neck of the fuel filler pipe is designed to accept only an unleaded
gasoline filler nozzle. Under no circumstances should leaded gaso-
line be used because it will damage the emission control system and
may impair driveability and fuel economy. Gasoline for California-certified LEV
Your vehicle was certified to California ’s low emission vehicle (LEV)
standards as indicated on the underhood tune-up label. It is designed
to optimize engine and emission control system performance with
gasoline that meets the clean burning low-sulfur California gasoline
specifications. If you live in any other state than California, your ve-hicle will operate on gasoline meeting Federal specifications. Gaso-
line sold outside California is permitted to have higher sulfur levels,
which may affect the performance of your vehicle ’s catalytic converter

Starting and operating7-3
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and may produce a sulfur exhaust odor or smell. SUBARU recom-
mends that you try a different brand of unleaded gasoline having low-
er sulfur to determine if the problem is fuel related before returningyour vehicle to an authorized dealer for service. Gasoline for cleaner air
Your use of gasoline with detergent additives will help prevent depos-
its 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, youshould 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 MTBE (Methyl Tertiary Butyl ether) or ethanol(ethyl or grain alcohol) may be used in your vehicle, but should con-
tain no more than 15% MTBE or 10% ethanol for the proper operationof your SUBARU.
In addition, some gasoline suppliers are now producing reformulated
gasoline, which is 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 operators if their gasoline contains detergents and oxygenates
and if they have been reformulated to reduce vehicle emissions. As additional guidance, only use fuels suited for your vehicle as ex-
plained below. 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 un-
leaded 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 cosolvent and corrosion inhibitors
required to prevent damage to the fuel system. Do not use fuel con-

GAS STATION REFERENCE
Fuel:Use only unleaded gasoline with an octane rating of 87
AKI or higher. Fuel octane rating:
This octane rating is the average of the Research Octane
and Motor Octane numbers and is commonly referred toas the Anti Knock Index (AKI). Refer to “Fuel” section in
this manual.
Fuel capacity: 16.9 US gal (64 liters, 14.1 Imp gal)
Engine oil: Use only API classification SL with the words “ENERGY
CONSERVING”
and the New API certification mark (starburst mark) dis-played on the container (ILSAC GF –3).
Engine oil capacity: 4.2 US qt (4.0 liters, 3.5 Imp qt)
Cold tire pressure: See the label located under the driver ’s door latch.