So I've decided to bite the bullet and bring the R over to NY where I go to med school. However, having grown up in So Cal all my life I'm a little clueless on how having a car during East Coast winters works. First, I know I'll need snow tires during the winter. I'm not that stupid. However, is it really necessary to wash out the salt from the underside of the car everytime you drive it outside? I'll be in the Bronx and it seems to me that they salt the roads pretty heavily. I always see people going to the car wash after the roads start becoming slushy and muddy. Should I just get the underside coated? Second, if I plan on not driving the car for perhaps a few weeks, I assume I need to make sure the gas tank is full to prevent condensation? I also heard I should always keep the tank at least half way full if I'm driving around for the same reason? Any other winter driving tips would be appreciated!