about the temps: wind chill will have no effect on the coolant (or anything except living organic matter), you only need concern yourself about the ambient temp.
i think that if you have a block heater and/or you run it every so often, you should be OK
Higher water mix in the coolant is better for hot areas as it disipates heat a bit better...Higher antifreeze is less likely to, well, freeze. you probably have a 50/50 mix, and what I would do is draim about 500ml out of the system and replace with pure coolant. then drive to a parts store or princess auto or something and buy a coolant tester. **LET THE CAR COOL** and then remove the cap slowly and test the fluid. If its still not that you would like, repeat the process, but I wouldnt add more than 1L of pure coolant - you probably dont need to. Also remember that when spring rolls around, you will want to dilute it back so that it cools the engine on hot days.
Last edited by ricosuave; 12-20-2008 at 08:35 AM.
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