I have a 2000 Cadillac sts which sits in the garage alot?

Honestly those cars had more problems with the lower end of the engines leaking oil than they do headgaskets. The engine half seals leak and cost $2000-2500 to fix. Yes, you are causing problems by not driving the car. Things go bad by both time and mileage. The battery is draining to keep the engine computer, clock, radio memory and other things alive. If it is not driven the battery drains until it is dead. If you drive it only for short distance the engine never recharges the battery. You need to be driving it at least 10 minutes at a time before shutting it off, and at least once a week or more. Gasoline goes bad in approx 1 month to 6 weeks. Your gas is going to gel up in the fuel injectors and fuel tank before you use it all. If you arent willing to drive the car then the best optino is to sell it.

Dude, if you're afraid to drive it out of fear of POSSIBLE repairs, you ought to sell it. It doesn't increase in value, you know. As far as the battery goes, every week should keep it charged. The security system drains a little bit, and the cold weather, even in a garage doesn't help. Yes, the seals will go bad if you let it just sit, but it takes months and months for that to happen. Sell the car and buy something you can drive and enjoy. Life is too short to look at a pretty car and not drive it. Just a thought! Good luck.

Even the newer cars still should be driven at least 50 miles at 'freeway speeds' or for an hour at least once a week to keep everything running smoothly, with fewer than the 'normal' maintenance issues. My father used to take the neighbor's car out once a week for an hour because she drove only locally ... and her car ran as smoothly and well as our car, which was on the freeway at least an hour every day! So ... make a 'date' with your car (Sunday afternoons are perfect) and take it out for a good spin. Your car will love you, and you will love it more, too!

3 times a week atleast.