Toyota Sienna 2010 Owner's Manual page 440

Coolant selection
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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
When the engine 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.
NOTICE
When adding engine coolant
■
Coolant is neither plain water nor straight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
If you spill coolant
■
Be sure to wash it off with water to prevent damage to parts or paint.
4-3. Do-it-yourself maintenance
4
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