2003 Lexus LX 470 User Guide - Page 373

ENGINE Coolant type selection Use of improper coolants may damage your engine cooling system. Your coolant must contain ethylene-glycol type coolant for proper corrosion protection of your engine that contains aluminum components. We have used "Toyota Genuine Long Life Coolant" in your Lexus vehicle. In order to avoid technical problems, we strongly recommend using "Toyota Genuine Long Life Coolant" or equivalent. In addition to preventing freezing and subsequent damage to the engine, this type of coolant will also prevent corrosion. Further supplemental inhibitors or additives are neither needed nor recommended. Read the coolant container for information on freeze protection. Follow the manufacturer's directions for how much to mix with plain water (preferably demineralized water or distilled water). The total capacity of the cooling system is given on page 345. We recommend a 50% solution for your Lexus, to provide protection down to about -35_C (-31_F). When it is extremely cold, to provide protection down to about -50_C (-58_F), a 60% solution is recommended. Do not use more than 70% solution for better coolant performance. The engine cooling system is integral to maximizing performance of your Lexus vehicle. In line with this, it is strongly recommended that you use "Toyota Genuine Long Life Coolant" for protecting the system, as it is an ethylene-glycol based premium antifreeze coolant with excellent corrosion protection properties that has been specifically formulated for use in Lexus vehicles. Please contact your Lexus dealer for further details about "Toyota Genuine Long Life Coolant". NOTICE Do not use alcohol type antifreeze or plain water alone. 355