Subaru 2005 Forester Owner's Manual page 410

Incorrect tire pressures detract from controllability and
ride comfort, and they cause the tires to wear abnor-
mally.
Correct tire pressure (tread worn evenly)
Roadholding is good, and steering is responsive. Roll-
ing resistance is low, so fuel consumption is also low-
er.
Abnormally low tire pressure (tread worn at
shoulders)
Rolling resistance is high, so fuel consumption is also
higher.
HSB052AA
Maintenance and service
HSB053AA
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