Subaru WRX & WRX STI Manuals 2015 WRX & WRX STI Owner's Manual | Page 428

Maintenance and service/Engine oil

that has spilled over the exhaust
pipe and/or under-cover. If spilled oil
is not promptly wiped up, the oil
could cause a fire.

Except STI

4. Drain out the engine oil by removing
the drain plug while the engine is still
warm. The used oil should be drained into
an appropriate container and disposed of
properly.

WARNING
Be careful not to burn yourself with
hot engine oil.
5. Wipe the seating surface of the drain
plug with a clean cloth and tighten it
securely with a new sealing washer after
the oil has completely drained out.

CAUTION
Thoroughly wipe off any engine oil

6. Pour engine oil through the filler neck.
For the oil capacity (guideline), refer to
“Engine oil” F12-4.
The oil quantity indicated above is only
guideline.
The necessary quantity of oil depends on
the quantity of oil that has been drained.
The quantity of drained oil differs slightly
depending on the temperature of the oil
and the time the oil is left flowing out. After
refilling the engine with oil, therefore, you
must use the level gauge to confirm that
the level is correct.
7. Start the engine and make sure that no
oil leaks appear around the drain plug.
8. Run the engine until it reaches the
normal operating temperature. Then stop
the engine and wait a few minutes to allow
the oil drain back. Check the oil level
again and if necessary, add more engine
oil.

11-15

exhaust pipe, it may cause a bad
smell, smoke, and/or a fire.

& Recommended grade and
viscosity
CAUTION
Use only engine oil with the recommended 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 engine.

& Synthetic oil
You must follow the oil and filter changing
intervals shown in the Warranty and
Maintenance booklet.

NOTE
CAUTION
Be careful not to spill engine oil
when adding it. If oil touches the

Synthetic oil of the grade and viscosity
noted in chapter 12 is the recommended engine oil for optimum engine
performance. Conventional oil may be
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