Millers Oils Extra Cool Engine Coolant / Anti Freeze Additive - 250ml

A 250ml bottle treats up to 10 litres of water. Calculate your cooling system's total capacity and add the appropriate amount of Extra Cool.

No, Extra Cool is an additive designed to enhance the performance of your existing coolant and antifreeze. It does not provide freeze protection on its own.

It is typically added during a coolant change or when topping up the system. Follow your vehicle's maintenance schedule for coolant replacement.

No, Extra Cool contains anti-corrosion additives and is formulated to be safe for all types of antifreeze and coolant, protecting your system.

The primary benefit is its ability to significantly lower engine running temperatures, helping to prevent overheating and improve coolant system efficiency.

Yes, Extra Cool is safe to mix with any form of antifreeze and coolant.

Ensure the product was correctly diluted (1 bottle per 10 litres of water). Verify there are no other cooling system issues such as a faulty thermostat, blocked radiator, or failing water pump.

Check for leaks in the cooling system. Ensure the system was properly bled of air after topping up.

While Extra Cool is safe to mix, pre-existing coolant condition or contamination could cause this. It may indicate a need for a full coolant system flush and refill.