2012 Toyota Prius Owners Manual - Page 865

6-1. Specifications Cooling system 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 nonsilicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology Do not use plain water alone. Gasoline engine Capacity Power control unit Coolant type Ignition system Spark plug Make Gap DENSO SC20HR11 0.043 in. (1.1 mm) NOTICE