I have an appt tomorrow morning to get the Mopar engine block heater installed on the KJ! :signs1: It's usually parked outside, I'm wondering those that have them, what temps do you use them at and for how long do you plug in? Here it's going to be about -15F below (lows) for the next few days and usually around 0F for a low. I was thinking about setting the heater on a timer and having it come on for about 2 hours before the KJ gets driven? Is it possible to do overkill? Thanks!