Toyota PRIUS ALPHA 2012 Quick Reference Manual page 580

6-1. Specifications
Cooling system
Gasoline
engine
Capacity
Power
control
unit
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.
566
Without an exhaust heat recovery system
6.9 qt. (6.5 L, 5.7 Imp.qt.)
With an exhaust heat recovery system
7.6 qt. (7.2 L, 6.3 Imp.qt.)
2.2 qt. (2.1 L, 1.8 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 technol-
ogy
Do not use plain water alone.
DENSO SC20HR11
0.043 in. (1.1 mm)