Choosing the Right Antifreeze

Question:

My car is five years old, so it’s time to have the cooling system flushed and new antifreeze installed. The antifreeze called for, however, is about $20 a gallon more than the antifreeze that I’ve used in the past. Is there any reason to use the more expensive product? I never had problems with the cheaper antifreeze.
 

Answer:

You should use the antifreeze recommended by the vehicle manufacturer. That way, the antifreeze will be compatible with the metals, gaskets, seals and hoses used in the cooling system. The wrong antifreeze could promote corrosion, which could lead to rust deposits capable of clogging cooling passages and causing overheating. In addition, your car may require additives for the cooling system that are not present in all brands of antifreeze.

As you compare prices, keep in mind that some antifreeze containers hold coolant, which is 50 percent antifreeze and 50 percent water. Others are pure antifreeze that require you to add water to create the proper mix. Coolant is usually less costly, but you will need twice as much. Remember, too, that the costlier antifreeze probably has a longer life expectancy, likely five years instead of two.