7-3
Starting and operating/Fuel
Fuel
nozzle. Under no circumstances should
system performance may deteriorate and
leaded gasoline be used because it will
the CHECK ENGINE warning light/Mal-
damage the emission control system and
function indicator light may turn on. If this
CAUTION
may impair driveability and fuel economy.
happens, return to your authorized
SUBARU Dealer for service. If it is
! Gasoline for California-certified
determined that the condition is caused
Use of a fuel which is low in quality
LEV
by the type of fuel used, repairs may not
or use of an inappropriate fuel
If your vehicle was certified to California’s
be covered by your warranty.
additive may cause engine damage.
low emission vehicle (LEV) standards as
! Gasoline for cleaner air
indicated on the underhood tune-up label,
it is designed to optimize engine and
Your use of gasoline with detergent
& Fuel requirements
emission performance with gasoline that
additives will help prevent deposits from
The engine is designed to operate using
meets the clean burning low-sulfur Cali-
forming in your engine and fuel system.
unleaded gasoline with an octane rating
fornia gasoline specifications. If you live in
This helps keep your engine in tune and
of 87 AKI (90 RON) or higher.
any other state than California, your
your emission control system working
vehicle will operate on gasoline meeting
properly, and is a way of doing your part
! Fuel octane rating
Federal specifications. Gasoline sold out-
for cleaner air. If you continuously use a
This octane rating is the average of the
side California is permitted to have higher
high quality fuel with the proper detergent
Research Octane and Motor Octane
sulfur levels, which may affect the perfor-
and other additives, you should never
numbers and is commonly referred to as
mance of your vehicle’s catalytic converter
need to add any fuel system cleaning
the Anti Knock Index (AKI).
and may produce a sulfur exhaust odor or
agents to your fuel tank.
Using a gasoline with a lower octane
smell. SUBARU recommends that you try
Many gasolines are now blended with
rating can cause persistent and heavy
a different brand of unleaded gasoline
materials called oxygenates. Use of these
knocking, which can damage the engine.
having lower sulfur to determine if the
fuels can also help keep the air cleaner.
Do not be concerned if your vehicle
problem is fuel related before returning
Oxygenated blend fuels, such as MTBE
sometimes knocks lightly when you drive
your vehicle to an authorized dealer for
(Methyl Tertiary Butyl ether) or ethanol
up a hill or when you accelerate. Contact
service.
(ethyl or grain alcohol) may be used in
your SUBARU dealer if you use a fuel with
! MMT
your vehicle, but should contain no more
the specified octane rating and your
than 15% MTBE or 10% ethanol for the
vehicle knocks heavily or persistently.
Some gasoline contains an octane-en-
proper operation of your SUBARU.
hancing additive called MMT (Methylcy-
! Unleaded gasoline
clopentadienyl Manganese Tricarbonyl). If
Do not use any gasoline that contains
The neck of the fuel filler pipe is designed
you use such fuels, your emission control
more than 10% ethanol, including from
to accept only an unleaded gasoline filler
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