It might seem like a small detail, but the color of your engine oil can speak volumes about what’s going on inside your car.

While fresh oil is generally transparent and amber colored, black oil may mean it's time for a replacement and frothy oil can ...

At a time when vehicle diagnostics can demand a computer science degree, being able to get some insight into your engine health with nothing but a rag and a bit of know-how can be downright refreshing ...