Lexus 2003 SC430 Owner's Manual page 319

ENGINE
– COOLING SYSTEM
Capacity
Coolant type
NOTE:
"Toyota Genuine Long Life Coolant" is filled in your Lexus vehicle. In order to avoid technical problems, we strongly recommend
using "Toyota Genuine Long Life Coolant" or equivalent. Please contact your Lexus dealer for further details.
– IGNITION SYSTEM
Spark plug – Make
– Gap
– ELECTRICAL SYSTEM
Battery – Open voltage at 20_C (68_F):
– Charging rates
302
9.9 L (10.5 qt., 8.7 lmp.qt.)
"Toyota Genuine Long Life Coolant" or equivalent
With ethylene–glycol type coolant for a proper corrosion protection of
aluminum components
Do not use alcohol type antifreeze or plain water alone.
DENSO SK20R11
NGK IFR6A11
1.1 mm (0.043 in.)
12.8 V
12.4 V
12.0 V
[Voltage that is checked 20 minutes after the key is removed with all the
lights turned off]
5A max.
Fully charged
Half charged
Discharged