I live in freezing cold Canada and I will soon be storing my car for the winter, mainly because of all the salt the city puts on the streets. Anyway, the thing is I don't have anywhere indoors to store it so I'm putting it up on jack stands and covering it outside. Any advice on what how to maintain it during the winter. How many times a week should I start it up? I don't have a block heater so I can't plug it in. Any help would be appriciated.