Thanks for the feedback. 35lbs/horsepower is a good thing to remember. You are right about the gas mileage I get when towing with the van. Without the boat I get 22 highway, but with the boat only 12mpg. 90%+ of the 30k per year are without the boat though. Diesel just may be the way to go. I need this vehicle for work, hauling kids, and hauling my boat, in that order. Ford Powerstroke diesel....