Also referred to as HOAT, the product is beneficial as it offers good coolant to coolant compatibility. Hybrid antifreeze – Basically a combination, or the best parts of traditional antifreeze and OAT antifreeze.OAT antifreeze – Organic Acid Technology (OAT) is an extended life antifreeze that lasts for around 5 years in the vehicle compared to the original green that lasts for around 2, to 3 years.As technology moved on however, various types of other products entered the market. Green antifreeze– For a good many years, there was only one type of antifreeze that you could get, the standard green.There are essentially four main types of antifreeze: Antifreeze can however be purchased already as a diluted mixture of 50% antifreeze and 50% distilled water.ĭifferent types of antifreeze / engine coolant Difference between engine coolant and antifreezeĬoolant is the liquid that circulates around the engine and antifreeze is usually a concentrate of glycol that requires dilution before becoming the coolant. Changing engine coolant based on the retailers recommendations will prevent this type of electrolysis. Often by the time antifreeze or engine coolant electrolysis has occurred it’s too late as by this time the engine is leaking. Aluminium is particularly susceptible to corrosion from electrolysis. This can in turn make the coolant becomes electrically charged. Not by much, but a current of 0.20 volts or more can begin to corrode the internal metal components of the engine. Over time, engine coolant breaks down and becomes slightly acidic. prevent corrosion against rubber and plastic parts.prevent rust and corrosion of metal parts.prevent engine water from boiling in summer.prevent engine coolant from freezing in winter.A reputable antifreeze that has been changed based on the retailers recommended guide and has the correct mixture should provide year-round protection to: 100% antifreeze actually has a much higher freezing point at around -20° C or -5° F, compared to a 50/50 mix with water.Īnother benefit is that a good quality antifreeze, or engine coolant that has been regularly changed prevents rust corrosion. A 50/50 mixture of antifreeze and water will begin to boil between 240° C and 270° C (464° F and 518° F), although the exact boiling point depends on the pressure of the mixture in the engine.Īn obvious question might be, can you use 100% antifreeze? water is in fact the catalyst that makes antifreeze work. A mixture of 50% water and 50% antifreeze will freeze at around -37° C or -35° F.Īntifreeze also raises the boiling point, water boils at around 100° C, or 212° F, increasing this temperature will benefit a hot engine as boiling water can damage an engine. In case you’re asking ‘what temperature does antifreeze freeze, water freezes at 0° C, or 32° F. As the name suggests, antifreeze prevents the coolant inside your engine from freezing under normal winter conditions. The chemicals in antifreeze have huge benefits, and not only in winter. Antifreeze has many benefits to the engine cooling system. Ethylene glycol, or a more recent, less hazardous additive, but far more expensive propylene glycol can also be used. Typical colour of engine coolant / antifreezeĪntifreeze is a combination of distilled water and a type of alcohol. The colour of the engine coolant does not necessarily indicate a specific type. Engine coolant or antifreeze does in fact come in a variety of colours from green, yellow, pink, red, or orange. Commonly seen as a green colour as the bottle to the right suggests, engine coolant is a mixture of water and antifreeze. To ensure the engine is kept at an optimal running temperature, engine coolant is used. Veins in the radiator contain the hot coolant which air cools as the vehicle moves forward.Īirflow through the veins is maintained by a fan if the vehicle becomes hot due to being stationary for long periods.Ī significant number of engine failures are attributed in some way to engine cooling problems. The engine coolant becomes hot itself and so is transferred to a radiator located at the front of the car. Around half of this heat goes out of the exhaust, whilst the remaining heat remains inside the engine block.Ĭar engines need a way of cooling down else they will continue to increase in temperature until the working metal components inside will begin to literally melt, fuse together and the engine will seize. Engine coolant is a water based liquid that absorbs the heat from the engine. Some of this energy is used to move the vehicle forward (around one third), the other two thirds of the energy produced is converted to heat. Car engines create a great deal of energy by burning petrol or diesel.
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