Most car manufacturers suggest changing the engine oil every 3000 miles or six months. If you drive in heavy traffic often, you may want to change the oil more often since the engine is running at idle so often. For example, Taxis and Police cars require oil changes much more often.
If you rarely drive the vehicle, you should still consider changing the oil every six months. While your mileage may be minimal, the oil still breaks down as it ages.
You can look in the owners manual for your car to find the exact specifics regarding frequency of oil changes and what type of oil is recommended by the manufacturer. Changing your oil is the most important maintenance tasks you can do for you car, so it’s important to make sure the service is performed.