Recommended Grade And Viscosity; Synthetic Oil; Cooling System - Subaru Impreza 2016 Manual

& Recommended grade and
viscosity
CAUTION
Use only engine oil with the recom-
mended grade and viscosity.
Refer to Engine oil F12-4.
NOTE
Engine oil viscosity (thickness) affects
fuel economy. Oils of lower viscosity
provide better fuel economy. However,
in hot weather, oil of higher viscosity is
required to properly lubricate the en-
gine.
& 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. Refer to Engine
oil F12-4. Also, you must follow the oil
and filter changing intervals shown in the
maintenance schedule. Refer to Mainte-
nance schedule F11-3.
NOTE
Synthetic oil of the grade and viscosity
noted in chapter 12 is the recom-
mended engine oil for optimum engine
performance. Conventional oil may be
used with no detriment to engine dur-
ability or driveability.
Maintenance and service/Cooling system

Cooling system

CAUTION
. The cooling system has been
filled at the factory with a high
quality, corrosion-inhibiting,
year-around coolant which pro-
vides protection against freezing
down to −368C (−338F). Make
sure to always use genuine
SUBARU Super Coolant or an
equivalent (non-amine type cool-
ant).
. If the coolant requires water dilu-
tion, be sure to use soft water (or
clear and drinkable water) and to
follow the required dilution ratio.
. Mixing with a different coolant
and/or hard water may result in
problems including, but not lim-
ited to, shortened engine compo-
nent life, cooling system clog-
ging, coolant leaks and engine
damage from overheating. There-
fore, never mix different kinds of
coolant and/or hard water even if
freezing temperatures are not
expected.
. Do not splash the engine coolant
over painted parts. The alcohol
11-19
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