Before we retired and she dragged me into city, on the farm was a 2 car garage for car and 1/2 ton, no heat and scads of mice, with poison all over the place.
Wife can't stand them.
I would use the remote start in winter when cold, never tought to leave the door close to see if it killed mice. I would have gave it a shot, you would want to vent are interior a bit before driving after you back out.
I bet the hopped up 340 duster would have gassed the hell out of them, considering how fast you could dump a tank of gas with that, and 2 teens.