Subaru 2008 IMPREZA - Manual (Page 303)

& Recommended grade and
viscosity
Oil grade:
ILSAC GF-4, which can be identified with
the ILSAC certification mark (Starburst
mark)
or API classification SM with the words
“ENERGY CONSERVING”
These recommended oil grades can be
identified by looking for either or both of
the following marks displayed on the oil
container.
API Service label
1)
Indicates the oil quality by API designa-
tions
2) Indicates the SAE oil viscosity grade
3) Indicates that the oil has fuel saving
capabilities
ILSAC Certification Mark (Starburst Mark)
In choosing an oil, you want the proper
quality and viscosity, as well as one that
will add to fuel economy. The following
table lists the recommended viscosities
and applicable temperatures.
When adding oil, different brands may be
used together as long as they are the
same API classification and SAE viscosity
as those recommended by SUBARU.
SAE viscosity No. and applicable tempera-
ture
*:
5W-30 is preferred.
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 engine.
CAUTION
Use only engine oil with the recom-
mended grade and viscosity.
Maintenance and service
11-11
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