My brother-in-law works for Chrysler proving grounds as a mechanic and he is the one that advised me NOT to start the car every month. !st he told me the car would have to run at least 1/2 hour to warm it enough to keep moisture from condensation after you shut it off. 2nd he told me your cylinders are as dry in a month as they are in 6 months. He also advised me to jack the car off the ground, better for suspension and avoids flat spots on tires.