IMPREZA(NA) A1850BE-A (ENGLISH)
11
Maintenance and service
11-15
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J Recommended grade and viscosity
under severe driving conditions
If the vehicle is used in desert areas, in areas with
very high temperatures, or used for heavy-duty ap-
plications such as towing a trailer, use of oil with the
following grade and viscosities is recommended.
API classification SL or SJ:
SAE viscosity No.: 30, 40, 10W-50, 20W-40,
20W-50
J Synthetic oil
You can use synthetic engine oil that meets the
same requirements given for conventional engine
oil. When using synthetic oil, you must use oil of the
same classification, viscosity and grade shown in
this owner’s manual, and must follow the oil and filter
changing intervals shown in the maintenance
schedule.
Cooling system
WARNING
Never attempt to remove the radiator cap until
the engine has been shut off and has cooled
down completely. Since the coolant is under
pressure, you may suffer serious burns from a
spray of boiling hot coolant when the cap is
removed.
CAUTION
D The cooling system has been filled at the
factory with a high quality, corrosion-inhibit-
ing, year-around coolant which provides
protection against freezing down to –33°F
(–36°C). For adding, use genuine SUBARU
coolant or an equivalent: a mixture of 50%
soft water and 50% ethylene-glycol basis cool-
ant. Use of improper coolants may result in
corrosion in the cooling system. It is impor-
tant to maintain protection against freezing
and corrosion, even if freezing temperatures
are not expected. Never mix different kinds of
coolant.
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