Toyota Tacoma 2018 Owner's Manual page 512

512
7-3. Do-it-yourself maintenance
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Coolant selection
Only use "Toyota Super Long Life Coolant" or a 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% deion-
ized water. (Minimum temperature: -31°F [-35°C])
Canada:
"Toyota Super Long Life Coolant" is a mixture of 55% coolant and 45% deion-
ized water. (Minimum temperature: -44°F [-42°C])
For more details about coolant, contact your Toyota dealer.
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If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir cap, drain cock
and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
WARNING
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When the engine is hot
Do not remove the radiator cap and engine coolant reservoir cap. (→P. 617)
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
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When adding 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.
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If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.