One of the most important and inexpensive services you can do for your car is an oil and filter change. After about 3000 miles the oil in a car begins to break down in its ability to lubricate the engine properly.
Neglect here can be extremely expensive. Common repairs can cost anywhere from $1500 to $4000 or higher. Additionally the car will be out of service for several days. The inconvenience of break down and towing should be considered.
Regular oil should be changed every 3000-4000 miles. Synthetic oil should be changed every 6000-8000 miles.