human
I've heard that I should get my car's oil changed every 3,000 miles or so. What does this mean, and why is it important?
assistant
That’s a good rule of thumb for most cars. It’s based on the fact that an engine needs to be lubricated with oil, and that oil needs to be changed regularly. If you drive your car hard and often, then you will need to change the oil more frequently. However, if you drive gently and don't put too much stress on your engine, then you can go longer between oil changes.