Antifreeze is an essential part of what makes an engine run, and it’s especially important in extreme weather conditions. Like most chemicals, antifreeze can grow acidic and corrosive over time, and should be changed from time to time. Knowing when to change and how to dispose of antifreeze is not always apparent, however. Luckily, we’re here to help.
What is antifreeze?
Antifreeze is an engine coolant meant to mix with water and then maintain a level engine temperature. According to Chem Group, antifreeze is a glycol-based fluid made primarily from propylene glycol. It used to be made from ethylene glycol as well for a time, but this was changed soon after the sweet-smelling and tasting liquid was implicated in dangerous and occasionally fatal toxicity in pets and children.
Both propylene glycol and ethylene glycol are toxic, according to Chem Group. And though propylene glycol is more common, ethylene glycol can still be found in some brands of antifreeze.
Modern antifreeze mixes with the water in a car engine and lowers the freezing temperature of water while also increasing its boiling point. The liquid mixture is then pumped through the engine, acting as a coolant and preventing corrosion. Experts and car manufacturers recommend changing antifreeze every 30,000 to 60,000 miles, though this can vary depending on the make and model of your car.
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