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Motul AutoCool Optimal -37°C is a “ready-to-use” long-life antifreeze/coolant designed to simplify cooling system maintenance. Because it’s premixed, you do not need to dilute it. Its OAT formula uses organic acids rather than silicates or phosphates, which helps maintain protection against corrosion even after long periods of use. The high boiling point under pressure helps especially in hot climates or under load, while the strong freeze protection ensures the cooling system remains safe in very low ambient temperatures. It’s suitable for a wide range of vehicles—passenger cars, heavy duty, construction and agricultural equipment, even stationary and marine engines. For optimal performance, it's recommended to use coolant change intervals per the vehicle/manufacturer’s spec, keep the cooling system clean, and avoid mixing with non-OAT or conventional coolants.
