How often does a vehicle need to be driven in order to keep everything running good. In the winter, I only drive when the roads allow me to return with a clean vehicle which is not very often. I stabilize the fuel and tend the battery. Does having the vehicle sitting for long periods of time have any negative effects.

 

The only thing I'd really worry about is having the car sitting on a car concrete garage floor. Over time, the tires can develope flat spots, and consequently not run smoothly.