Good advise give above...here are some additional tips for Winter storage.
- Put a tarp on the garage floor, this keep the cold and moisture away from the underside - $10.00 @ CT
- Use dense foam or carpet and park the car on these items, this way you don't have to worry about flat spots or removing the wheels.
- Cover the wheels with Winter tires bag or garbage bags, so water don't get onto the Rotors and causing rust
- Put plastics bags over the exhaust openings
- Inflate the tires 2-3 PSI higher
- Change the oil before storage, fill-up with gas and add stabilizer
- Place bounce sheet inside the car, trunk, engine, and hood
- Leave the battery in the car and add a battery tender, the alarm would now enabled and usable
- Put an old blanket on the seats, this will help the drying out of the leather causing cracks
- Leave the car in neutral, and don't set the parking brake
These are the things that I do for my NSX for winter storage.
Bram