Break-In Period; Fuel - Toyota 2003 Prius Owner's Manual

104.Break–in period
Drive gently and avoid high speeds.
Your vehicle does not need an elaborate
break–in. 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:
D
Avoid full–throttle acceleration
starting and driving.
D
Avoid racing the hybrid engine.
D
Try to avoid hard stops during the first
300 km (200 miles).
148

105.Fuel

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
when
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 3.5–M93
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.