I still haven't got a chance to get a good ABA. Between the scanguage and the truck computer it's 3 or more mpg on the HWY. I recently change the plastic material to "3M 2174W Outdoor Patio Door Insulator Kit with Tape Dispense" and welded the emt, removed the hose clamps. I was able to use only one box of the 3m stuff with some creative cutting. This stuff has no rip-stop but it is nearly invisible. Pictures to come.
Amazon.com: 3M 2174W Outdoor Patio Door Insulator Kit with Tape Dispense