I am going away for 5 weeks from mid-February, and will leave my car on a friend's land, but in the open and uncovered, during that time. I plan to leave the handbrake off to avoid the brakes seizing, but my friend has suggested that he should start the engine once a week. Is this a good idea, or is it better to leave it alone? Is there anything else I should do? I have read your advice on long-term storage, but I assume that much of this is unnecessary for only 5 weeks.