I stopped traffic — not in a good way — the first time I had to refuel a car with Ford's nifty new capless gas filler. The ensuing traffic backup was because of my ineptitude rather than any problem ...

Owners of vehicles cradling GM’s baby Duramax turbodiesel engines are likely familiar with the capless fuel filler system. While this system is designed to make refueling easier, adding a fuel cap can ...