two months? no. My Camaro spent a FEW months sitting while I was in Kandahar and Bagram. In Kandy Land, all I had to worry about was flat spots on the tires and an oil change. The flat spots rounded back out after a few trips to work and back on the interstate in the summer heat. This last year in Bagram showed that I needed an oil change. The Grand Prix has never sat longer than a day or two, so I can't really tell you what is specific to them.