Rick's Free Auto Repair Advice

Coolant versus antifreeze

Coolant versus antifreeze — is there a difference?

What is antifreeze?

Modern antifreeze is a mixture of approximately 95%  ethylene glycol and 5% corrosion inhibitors, buffers and lubricant additives. It’s concentrated and is deigned to be diluted with distilled or de-ionized water for use in your engine.

What is coolant?

Coolant is a a combination of antifreeze and water. The normal dilution is 50% antifreeze to 50% water.

Coolant versus antifreeze — the real difference

Antifreeze is the concentrate and coolant is the diluted version. However, you can buy already diluted coolant and pour it right into your vehicle.

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Posted on by Rick Muscoplat



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