Subaru 2009 Impreza User Manual download pdf (Page 327)

11-12 Maintenance and service

& 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.

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