Can a Person Mix Antifreeze?

Some antifreeze can be mixed with other antifreeze, such as types that use propylene glycol or ethylene glycol bases. Mixing different colors of antifreeze, however, can cause corrosion and cooling-system malfunctions if the corrosion inhibitors are not compatible with each other.

Conventional antifreeze and extended-life antifreeze cannot be mixed together, as this causes the antifreeze to become cloudy and lose the extended-life properties. Hybrid antifreeze can be mixed with both conventional and extended-life antifreeze, and it has effective corrosion protection and a long lifespan. Different types of antifreeze can often be identified by their color; for example, extended life is usually orange, and hybrid is usually yellow.