It might not be on your list of regular car maintenance tasks, but it's important to keep your gas cap clean and ensure it's ...

Gas tank caps: They play an important part in your car's fuel system, even setting off a check engine light on the dashboard if they go missing or aren't screwed on correctly after refueling. Yet ...

On the scale of all the things that annoy you about car ownership, the actual act of refueling your car probably isn't high on the list, and twisting off the gas cap isn't on it at all. Well, except ...