Since my truck isn't being driven much at the moment, how much should I drive it, so as to keep the tires from dry rotting? I'm a bit concerned, as it has snow tires on it, so I don't want to drive off the rubber in the hot temps we are having, yet I don't want them to be dead come winter. This would be a general question, as when I get proper all seasons for summer I'd be curious for them. No place to park in shade, either.