I read the other day that the 06 1500 has a tailgate spoiler which is supposed to help with gas mileage along with the cylinder deactivation. I believe what I read also stated that the spoiler was not included on the 2500 and 3500 models. If the spoiler helps fuel mileage why is it not included on the heavy duty Dodge? Is this something that we might be able to add to 3rd generation heavy duty trucks? Has anyone actually seen one of these spoilers? I have an 05 2500 with the Sport package and really would like a spoiler if it is something that makes the truck look cool.