Another thing I like to do is add moth ***** to atleast the tailpipes and up under the hood. That should keep those pesky mice from trying to make little nests in various places. I forgot to put some under the hood last year and had a nice big twig and brush nest all over the intake. They're cheap and good insurance. You can put them inside the car too if you'd like to keep them from trying to climb inside somehow. They stink a little so you'll need to air the car out real good come spring.

I just fill it with premium and stabil, wax it, car cover it, a few moth ***** and don't look back til spring. Although this winter she's getting a new power plant so the cover will be off a lot.