Its one of life’s real paradoxes that in order to make money or to save money we have to spend money. It costs a bit to put a lock on the door, but you would not think of going without one! And so it is with diesel anti-siphoning devices. They cost a bit, finding the right one that fits can sometimes be a bit of an exercise, they have to be fitted, but once in place they will be saving you fuel the whole life of your Truck.