[DNADriver]

In the summer you need more coolant than antifreeze. Do you change the liquid in your radiator, or do you use a general purpose one all year round?

[Jon]

What country do you live, DNA? Because in the United States, we don't have seperate containers for coolant and antifreeze (at least, not that I've ever seen). They're both combined into one unit (one bottle). A 50/50 water/radiator liquid mixture is more than adequate for summer or winter use.

[MaximumSpeed]

I usually just use water in the summer, since antifreeze isn't really required. It's cheaper because I can just fill it from the garden hose.