Finally an automaker decided to make a basic and yet very welcoming improvement to the one component presents in all cars, the fuel cap. Starting with the 2008 Ford GT and Lincoln MKS (the Lincoln brand is owned by Ford Motors)
Basically a flap is used to prevent gasoline fumes from escaping, working much like a valve that opens from the pressure of the gas nozzle when pumping gas. The design came from Ford’s experience in the NASCAR racing series.
I myself has lost a couple gas caps before, it’s an annoying experience. Though a very small improvement, these are some of the more thoughtful innovations that benefits the consumer while not incurring high cost nor adding unecessary complexity to the vehicle. However, this will not prevent anyone from doing this.