How to Know When It's Time for an Oil Change

Changing your oil is one of the most basic yet most important bits of maintenance you should be doing for your car, but how do you know when your vehicle is due for an oil change? Conventional wisdom says that you should change your oil every three months or every 3,000 miles, but newer vehicles can go for about 7,500 or even as far as 10,000 miles before their oil needs to be changed.