2011 Toyota Prius Owners Manual - Page 466

4-3. Do-it-yourself maintenance n Coolant selection Only use "Toyota Super Long Life Coolant" or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology. U.S.A.: "Toyota Super Long Life Coolant" is a mixture of 50 % coolant and 50 % deionized water. (Enabled: -31 °F [-35 °C]) Canada: "Toyota Super Long Life Coolant" is a mixture of 55 % coolant and 45 % deionized water. (Enabled: -44 °F [-42 °C]) For more details about engine coolant, contact your Toyota dealer. CAUTION n When the hybrid system is hot Do not remove the coolant reservoir cap. The cooling system may be under pressure and may spray hot coolant if the cap is removed, causing burns or other injuries. 4 NOTICE n When adding the coolant Coolant is neither plain water not straight antifreeze. The correct mixture of water and anti freeze must be used to provide proper lubrication, corrosion protection and cooling. Be sure to read the antifreeze or coolant label. n If you spill coolant Be sure to wash it off with water to prevent it damage to parts or paint. Maintenance and care 443 PRIUS_U (OM47685U) DVD