Anyone can make an experiment in testing trucks that are manufactured in the United States. But one of the most convincing methods is to choose used trucks. This way the efficiency of the design will reflect the reputation of the trucks’ manufacturer. But a more accurate method should be that they have to be more or less manufactured in the same year, because if everything is just based on mileage alone one factor is not balanced enough to prove the worthiness of the trucks in various challenges. In other words some things will be missed out and the ruling may not be officially recognized, but will only be classified as a form of entertainment.