If you are using your vehicle on the regular during the winter months, you do not need to start it every day just to keep it running. Your normal driving routine will take care of maintaining the vehicle. However, if you are planning on storing the vehicle for the winter, then you may come across many people that suggest running it on an idle daily or weekly for a few minutes to keep the battery charged and the condensation away. However, doing this will actually have negative effects on the battery since it does not gain enough energy in the short idle run to restore the energy used while starting the engine, plus it amounts to wasted fuel. So the best thing to do is to leave the vehicle in storage for the winter with the battery disconnected and when you plan on driving it again, recharge the battery or jump start it and go for a drive to recharge the battery using the vehicle’s charging system.