Those with block heaters, and use them, I have a question..How "hot" does your coolant get when plugged in overnight? I realize this could be dependent on ambient temps, possibly, but I'm curious. As an example, my block heater heats the coolant to ~100*F when plugged in overnight. Is this a normal temp for these things? Seems my '96 got hotter than that, but not 100% positive.