Subaru 1998 Impreza Owner's Manual page 248

CAUTION
D The cooling system has been filled at the factory with a high
quality, corrosion-inhibiting, 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 coolant.
Use of improper coolants may result in corrosion in the cooling
system. It is important to maintain protection against freezing
and corrosion, even if freezing temperatures are not expected.
Never mix different kinds of coolant.
D Do not splash the engine coolant over painted parts. The alco-
hol contained in the engine coolant may damage the paint sur-
face.
Rubber gaskets
3. After refilling the reserve tank and the radiator, reinstall the caps and
check that the rubber gasket inside the radiator cap is in the proper
position.
Maintenance and service
HG0115
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