[JayChicago]

Yeah, I remember block heaters. The good ones went in the lower radiator hose, and thermal circulation would move some heat through the engine block. Cheap ones were easy-to-install dip stick heaters, just providing a little heat to the oil at the end of the dip stick.

In Florida, I would suggest using the minimal amount of antifreeze needed. Pure water provides a little better heat transfer for hot days. (I would not consider how antifreeze raises the boiling point; if you are above 212 degrees, probably should stop driving) There should be a chart on the back of the antifreeze bottle showing how much to add to get protection down to the lowest temp it ever gets in your location. But then you might want to add some rust inhibitor, since you will getting a minimal amount from the additives in the antifreeze.