2002 SUBARU IMPREZA WRX fuel consumption

Driving tips
8-2
New vehicle break-in driving –
the first 1,000 miles (1,600 km)
The performance and long life of your vehicle are
dependent on how you handle and care for your ve-
hicle while it is new. Follow these instructions duringthe first 1,000 miles (1,600 km): Do not race the engine. And do not allow engine
speed to exceed 4,000 rpm except in an emergen-
cy. Do not drive at one constant engine or vehicle
speed for a long time, either fast or slow. Avoid starting suddenly and rapid acceleration,
except in an emergency. Avoid hard braking, except in an emergency.
The same break-in procedures should be applied to
an overhauled engine, newly mounted engine or
when brake pads or brake linings are replaced withnew ones. Fuel economy hints The following suggestions will help to save your fuel.
Select the proper gear position for the speed and
road conditions. Avoid sudden acceleration or deceleration. Al-
ways accelerate gently until you reach the desired
speed. Then try to maintain that speed for as longas possible. Do not pump the accelerator and avoid racing the
engine. Avoid unnecessary engine idling.
Keep the engine properly tuned.
Keep the tires inflated to the correct pressure
shown on the tire placard, which is located under the door latch on the driver ’s side. Low pressure will
increase tire wear and fuel consumption. Use the air conditioner only when necessary.
Keep the front and rear wheels in proper align-
ment. Avoid carrying unnecessary luggage or cargo.

Maintenance and service
11-39
– CONTINUED –
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 drivingthe 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 The air pressure in a tire increases by approxi-
mately 4.3 psi (30 kPa, 0.3 kg/cm 2
) when the tire
becomes warm. The tires are considered cold when the vehicle
has been parked for at least three hours or hasbeen 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.
Correct tire pressure (tread worn evenly)
HGB033AA
Roadholding is good, and steering is responsive.
Rolling resistance is low, so fuel consumption is
also lower.

Maintenance and service
11-40
Abnormally low tire pressure (tread worn at
shoulders)
HGB024AA
Rolling resistance is high, so fuel consumption is
also higher.
Abnormally high tire pressure (tread worn in
center)
HGB025AA
Ride comfort is poor. Also, the tire magnifies the
effects of road-surface bumps and dips, possibly
resulting in vehicle damage.
If the tire placard shows tire pressures for the ve-
hicle when fully loaded and for the vehicle when
towing a trailer, adjust the tire pressures to the val-
ues that match current loading conditions.
WARNING
Driving at high speeds with excessively low tire pressures can cause the tires to deform
severely and to rapidly become hot. A sharp