Vinny, you've just unknowingly opened Pandora's box with your "...how often" question. I'm basically in the same mode as you, although I drive my car about 2000 miles per year, all between April and October. Since your in Atlanta, you probably drive your 1000 miles throughout all 12 months. Using Mobil 1, changing it once per year is fine, but don't go any longer, to be safe. Other than that, be sure you drive at least 15-20 miles per trip to be sure to get the oil hot enough to burn off any moisture that may collect. At that rate, your car will out live all of us.