There are many myths and misconceptions about automotive antifreeze, and one of the most common is that you can use any type of antifreeze in any vehicle. This simply isn't true. Different types of antifreeze are formulated for different types of engines, and using the wrong kind can cause serious problems.
One example is Dexcool, which is a type of extended-life coolant developed by General Motors. Dexcool is specifically designed for use in GM vehicles, and while it can be used in other vehicles, it's not recommended. That's because Dexcool contains organic acids that can corrode aluminum components – something that regular antifreeze does not do.
So if you have a GM vehicle, you should use Dexcool; if you have any other kind of vehicle, you should stick with regular antifreeze. It's really that simple. Trying to save a few bucks by using the wrong type of coolant is just not worth the risk.