I am looking at a new Expedition EL. I am in the market for a full size SUV to haul my wife, dogs and travel trailer. I have only owned GM products and currently have a Dodge Ram. My choices are narrowed to a Suburban and the Expedition. I know this site is biased, but please give me some real world input. Does the 5.4L drop any cylinders when cruising to help MPG? Thanks ahead of time for your thoughts. Tim C