Toyota 2003 Prius Owner's Manual page 67

ENGINE LUBRICATION
Oil capacity (drain and refill), L (qt, lmp.
qt.):
With filter 3.7 (3.9, 3.3)
Without filter 3.4 (3.6, 3.0)
"Toyota Genuine Motor Oil" is filled in your
Toyota vehicle. Use Toyota approved "Toyota
Genuine Motor Oil" or equivalent to satisfy the
following grade and viscosity.
Oil grade:
API grade SL "Energy–Conserving" or
ILSAC multigrade engine oil.
240
Recommended oil viscosity:
SAE 5W–30
oil008
Temperature range anticipated before next
oil change
Please contact your Toyota dealer for further
details.
181.COOLING SYSTEM
Total capacity, L (qt., Imp. qt.):
For gasoline engine 4.9 (5.2, 4.3)
For electric motor
and inverter and
converter 2.6 (2.7, 2.3)
Coolant type:
"Toyota Genuine Long Life Coolant" is
filled in your Toyota vehicle. In order to
avoid technical problems, we strongly
recommend using "Toyota Genuine Long
Life Coolant" or equivalent.
Please contact your Toyota dealer for
further details.
With ethylene–glycol type coolant for a
proper corrosion protection of aluminum
components
Do not use alcohol type antifreeze or plain
water alone.
AUXILIARY BATTERY
Open voltage at 20_C (68_F):
12.6 – 12.8 V Fully charged
12.2 – 12.4 V Half charged
11.5 – 11.9 V Discharged
[Voltage that is checked 20 minutes after
the key is removed with all the lights
turned off]
Charging rates: 3.5 A max.