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IMPREZA(NA) A1830BE-A (ENGLISH)
11
Maintenance and service
11-13
– CONTINUED –
HGB032BB
SAE viscosity number and applicable
temperature
1) 5W-30, SAE 5W-30 preferred
2) 10W-30, 10W-40
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 a towing a trailer, use of oil with
the following grade and viscosities is recom-
mended.
API classification SJ or SH:
SAE viscosity No.: 30, 40, 10W-50, 20W-40,
20W-50
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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