Lexus LX570 Manual page 578

4-3. Do-it-yourself maintenance
Engine coolant
The coolant level is satisfactory if it is between the "F" and "L" lines on the
reservoir when the engine is cold.
If the coolant level drops within a short time after replenishing
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Visually check the radiator, hoses, reservoir cap, radiator cap, drain cock and water
pump. 
If you cannot find a leak, have your Lexus dealer, test the cap and check for leaks in
the cooling system.
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 Lexus dealer.
578
LX570_U (OM60F86U)
Reservoir cap
"F"
"L"
If the level is on or below the "L"
line, add coolant up to the "F" line.