I didn't know that the car would be idling for 15 minutes or more! If your car does not have a block heater, install one on the lower radiator hose. This will save you a lot of money on maintenance costs due to excessive idling. Your car will have a power cord under the left side of the front bumper typically with a 3 prong grounded plug. This is the block heater, which is in the block right behind the starter with a black ribbed wire consisting of 3 wires in it.

I was kinda liking the idea of a remote starter to start my car with a block heater plugged in and the remote would start the engine and turn on the heat about 2 minutes before I drive off.