Subaru IMPREZA 2002 Owner's Manual page 364

Driving even a short distance warms up the tires
and increases the tire pressures. Also, the tire pres-
sures are affected by the ambient temperature. It is
best to check tire pressure outdoors before driving
the vehicle.
When a tire becomes warm, the air inside it ex-
pands, causing the tire pressure to increase. Be
careful not to mistakenly release air from a warm tire
to reduce its pressure.
NOTE
D The air pressure in a tire increases by approxi-
mately 4.3 psi (30 kPa, 0.3 kg/cm
becomes warm.
D The tires are considered cold when the vehicle
has been parked for at least three hours or has
been driven less than one mile (1.6 km).
WARNING
Do not let air out of warm tires to adjust
pressrue. Doing so will result in low tire pres-
sure.
Incorrect tire pressures detract from controllability
and ride comfort, and they cause the tires to wear
abnormally.
D Correct tire pressure (tread worn evenly)
2
) when the tire
Roadholding is good, and steering is responsive.
Rolling resistance is low, so fuel consumption is
also lower.
Maintenance and service
HGB033AA
– CONTINUED –
11-39