Subaru 1998 Forester Owner's Manual page 239

6. Remove the under cover.
7. Remove the oil filter with an oil filter wrench.
8. Before installing a new oil filter, apply a thin coat of engine oil to the
seal.
9. Clean the rubber seal seating area of the lower crank case and install
the oil filter by hand turning. Be careful not to twist or damage the seal.
10. Tighten it approximately two-thirds of a turn after the seal makes con-
tact with underside of the crank case.
CAUTION
Never over tighten the oil filter because that can result in an oil
leak.
11. Install the under cover.
12. Pour the specified amount of engine oil through the filler neck.
Oil capacity
4.8 US qt (4.5 liters, 4.0 Imp qt)
13. Start the engine and make sure that no oil leaks appear around the
filter's rubber seal.
14. 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.
Drain plug
Sealing washer
HS0175
Maintenance and service
Oil filter
HS0176
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