Lexus SC 430 2006 Owner's Manual page 316

Cooling system
Capacity
Coolant type
Ignition system
Spark plug
-Make DENSO
NGK
- Gap
NOTICE
Iridium-tipped spark plugs
■
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.
10.5 qt. (9. 9 L, 8.7 lmp.qt.)
Use either of the following:
• "Toyota Super Long Life Coolant"
• Similar high quality ethylene glycol based non-sil-
icate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid tech-
nology
Do not use plain water alone.
SK20R11
IFR6A11
0.043 in. (1.1 mm)
6-1. Specifications
303
6