[Zyal8r]

Any car can go in snow especially with real winter tires. It will get you there. The problem with any car is the salt. DO you really want to see frozen salt slush hanging from your rocker panels to the ground, with the entire car covered by salt spray. You will be wearing boots walking through a snowy slush parking lot only to bring the whole mess into the car. And the wide tires are like snowboards. And when you look under the hood you will see everything rusted and corroded.
Forget the z4 in winter.
Take it with you. The Summers up there are the best in the country albeit a bit short. Get a winter car. Store the Z. Cheaper and safer in the long run.