2003 TOYOTA PRIUS octane

150
Drive gently and avoid high speeds.
Your vehicle does not need an elaborate
breakin. But following a few simple tips
for the first 1000 km (600 miles) can add
to the future economy and long life of
your vehicle:
Avoid fullthrottle acceleration when
starting and driving.
Avoid racing the hybrid engine.
Try to avoid hard stops during the first
300 km (200 miles).FUEL TYPE
Your vehicle must use only unleaded
gasoline.
To help prevent gas station mixups, your To-
yota has a smaller fuel tank opening.
The
special nozzle on pumps with unleaded fuel
will fit it, but the larger standard nozzle on
pumps with leaded gas will not.
At a minimum, the gasoline you use
should meet the specifications of ASTM
D4814 in the U.S.A. and CGSB 3.5M93
in Canada.
NOTICE
Do not use leaded gasoline. Use of
leaded gasoline will cause the three
way catalytic converter to lose its
effectiveness and the emission con-
trol system to function improperly.
Also, this can increase maintenance
costs.
OCTANE RATING
Select unleaded gasoline with an Oc-
tane Rating of 87 (Research Octane
Number 91) or higher. Use of unleaded fuel with an octane num-
ber or rating lower than stated above will
cause persistent heavy knocking. If se-
vere, this will lead to engine damage.
If your engine knocks ...
If you detect heavy knocking even when
using the recommended fuel, or if you
hear steady knocking while holding a
steady speed on level roads, consult your
Toyota dealer.
However, occasionally, you may notice
light knocking for a short time while accel-
erating or driving up hills. This is normal
and there is no need for concern.
GASOLINE CONTAINING DETERGENT
ADDITIVES
Toyota recommends the use of gasoline that
contains detergent additives to avoid build
up of engine deposits.
However, all gasoline sold in the U.S. con-
tains detergent additives
to keep clean and/or
clean intake systems.
104.Breakin period 105.Fuel

151
QUALITY GASOLINE
Automotive manufacturers in the U.S., Eu-
rope and Japan have developed a specifica-
tion for quality fuel named WorldWide
Fuel Charter (WWFC) that is expected to
be applied world wide. The WWFC consists
of three categories that depend on required
emission levels. In the U.S., category 3 has
been adopted. The WWFC improves air
quality by providing for better emissions in
vehicle fleets, and customer satisfaction
through better vehicle performance.
CLEANER BURNING GASOLINE
Cleaner burning gasoline, including refor-
mulated gasoline that contains oxygenates
such as ethanol or MTBE is available in
many areas.
Toyota recommends the use of cleaner
burning gasoline and appropriately blended
reformulated gasoline. These types of gas-
oline provide excellent vehicle perfor-
mance, reduce vehicle emissions, and im-
prove air quality. OXYGENATES IN GASOLINE
Toyota allows the use of oxygenate blended
gasoline where the oxygenate content is up
to 10% ethanol or 15% MTBE.
If you use
gasohol in your Toyota, be sure that it has
an octane rating no lower than 87.
Toyota does not recommend the use of
gasoline containing methanol.
GASOLINE CONTAINING MMT
Some gasoline contain an octane en-
hancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl).
Toyota does not recommend the use of
gasoline that contains MMT. If fuel con-
taining MMT is used, your emission con-
trol system may be adversely affected.
The Malfunction Indicator Lamp on the in-
strument cluster may come on. If this hap-
pens, contact your Toyota dealer for ser-
vice. GASOLINE QUALITY
In a very few cases, you may experience
driveability problems caused by the partic-
ular gasoline that you are using. If you
continue to have unacceptable driveability,
try changing gasoline brands. If this does
not rectify your problem, then consult your
Toyota dealer.
NOTICE

Do not use gasohol other than
stated above. It will cause fuel sys-
tem damage or vehicle performance
problems.
 If drivability problems are encoun-
tered (poor hot starting, vaporizing,
engine knock, etc.), discontinue its
use.
 Take care not to spill gasohol dur-
ing refueling. Gasohol may cause
paint damage.

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106.FUEL TANK CAPACITY45 L (11.9 gal., 9.9 lmp. gal.)
The given fuel tank capacity is measured
on EPA/CARB ORVR testing condition
which is approved for nominal capacity
measurement condition.
The fuel tank capacity is decreased at low
ambient temperature. (decreased by about
5 L (1.3 gal., 1.1 lmp. gal.) at 10 C
(14 F).)
107.Fuel pump shutoff system
The fuel pump shutoff system stops sup-
plying fuel to the engine to minimize the
risk of fuel leakage when the engine stalls
or an airbag inflates upon collision. To
restart the hybrid system after the fuel
pump shutoff system activates, turn the
ignition switch to “ACC” or “LOCK” once
and start it.
CAUTION
Inspect the ground under the vehicle
before restarting the hybrid system. If
you find that liquid has leaked onto
the ground, the fuel system has been
damaged and it is in need of repair.
In this case, do not restart the hybrid
system.
If you plan to drive your Toyota in
another country...
First , comply with the vehicle registration
laws.
Second, confirm the availability of the cor-
rect fuel (unleaded and minimum octane
number).
108.Operation in foreign
countries

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Fuel type:Unleaded gasoline, Octane Rating 87
(Research Octane Number 91) or
higher
Fuel tank capacity, L (gal., lmp. gal.): 45 (11.9, 9.9)
179.Hybrid vehicle battery
Type: NickelMetal hydride battery
Voltage: 7.2 V
Capacity: 6.5 Ah (3HR)
Quantity: 38
Overall voltage: 273.6 V
180.Service specifications
ENGINE
Valve clearance (engine cold), mm (in.):Intake 0.17—0.23 (0.007—0.009)
Exhaust 0.27—0.33 (0.011—0.013)
Spark plug type: DENSO SK16R11
NGK IFR5A11
Spark plug gap, mm (in.): 1.1 (0.043)
178.Fuel