Lexus GS350 Owner's Manual page 527

Cooling system
Capacity
Coolant type
Ignition system
Spark plug
Make
Gap
NOTICE
Iridium-tipped spark plugs
■
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
GS350_300_GS F_OM_OM30G34U_(U)
GS350 9.9 qt.(9.4 L, 8.3 Imp.qt.)
Engine coolant

9.5 qt.(9.0 L, 7.9 Imp.qt.)
GS300
Intercooler

2.7 qt.(2.6 L, 2.3 Imp.qt.)
GS F 11.9 qt. (11.3 L, 9.9 Imp.qt.)
Use either of the following:
• "Toyota Super Long Life Coolant"
• Similar high-quality ethylene glycol-based non-
silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid tech-
nology
Do not use plain water alone.
GS350
DENSO NGK
FK20HBR8 DILFR7K9G
0.031 in. (0.8 mm) 0.04 in. (0.9 mm)
8-1. Specifications
GS300 GS F
DENSO
FK20HBR-J8
0.031 in. (0.8 mm)
525
8