Can You Mix Red And Green Antifreeze

Can You Mix Red And Green Antifreeze 1

There are many different types of antifreeze, each with their own specific benefits. However, one question that is often asked is whether or not it is safe to mix red and green antifreeze. While there are some exceptions, in general it is not recommended to mix these two types of antifreeze together.

Here’s a closer look at why this is the case and what you should do if you need to use both types of antifreeze in your vehicle.

Why You Shouldn't Mix Coolants and How to Fix it | AskDap

  • Start with equal parts red and green antifreeze
  • Mix the two types of antifreeze together in a container
  • Use the mixed antifreeze in your car as you would normally use either type of antifreeze alone
Can You Mix Red And Green Antifreeze


What is the Difference between Red And Green Antifreeze

The main difference between red and green antifreeze is the coolant they use. Red antifreeze uses ethylene glycol, while green antifreeze uses propylene glycol. Ethylene glycol is more toxic than propylene glycol, so it poses a greater risk to animals and humans if ingested.

Propylene glycol is less likely to cause harm if swallowed, making it the safer choice for many people.

Can You Mix Red And Green Antifreeze Together

When it comes to antifreeze, there are a few different types on the market. The most common type is ethylene glycol, which is what you’ll find in green antifreeze. There’s also propylene glycol, which is found in red antifreeze.

Although these two types of antifreeze are compatible with each other, it’s not recommended that you mix them together. The reason for this is because they have different properties and mixing them together can actually cancel out the benefits of each one. For example, green antifreeze has a higher boiling point than red antifreeze.

This means that it can better protect your engine from overheating in hot weather conditions. However, when you mix the two together, the boiling point goes down slightly. It’s also important to note that mixing different types of antifreeze can cause sediment to form in your cooling system.

This sediment can then clog up your radiator and cause serious problems for your engine. So, while you may be tempted to mix green and red antifreeze together to save money or because you’re running low on one type, it’s really not worth the risk.

Will Mixing Red And Green Antifreeze Affect My Car’S Performance

If you mix red and green antifreeze, it will not affect your car’s performance. The two colors are simply different dyes used to help identify which type of coolant is in the system.


Yes, you can mix red and green antifreeze, but it is not recommended. The reason for this is because the different colors can cause confusion when trying to determine which coolant goes into which vehicle.

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