Idling with heater on

Having the heater on hurts nothing. Running the engine at idle for hours is really not good for it. If this is something you need to do on a regular basis change your oil much more often. I would figure each hour of idling as 40-50 miles of driving and change the oil accordingly.

I have to sit in my Jeep Compass 2018 for about an hour a day should I leave the car running or shut it off completely