Lexus GS 450h 2008 Owner's Manual page 550

6-1. Specifications
Cooling system
Capacity
Gasoline engine
Power control unit
Coolant type
Ignition system
Spark plug
Make DENSO
Gap
NOTICE
Iridium-tipped spark plugs
■
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.
548
9.8 qt. (9.3 L, 8.1 lmp.qt.)
3.0 qt. (2. 9 L, 2.5 lmp.qt.)
Use either of the following:
• "Toyota Super Long Life Coolant"
• Similar high-quality ethylene glycol-based non-sili-
cate, non-amine, non-nitrite, and non-borate cool-
ant with long-life hybrid organic acid technology
Do not use plain water alone.
FK20HBR11
0.043 in. (1.1 mm)