Fresh motor oil has a nice amber color, but it doesn't stay that way for very long. Does a darker color mean it's time for an oil change? Not necessarily.

Healthy engine oil should be light brown, so if yours is black, you may be wondering if it's time for an oil change. Here's what you need to know.

You can change your car's oil right after a long drive, or before moving it anywhere, or do something in between. What's the best temperature for an oil change?