I used to have an E350 Ford van with a 7.3 that did a great job of towing. On one trip, we were traveling through South Dakota with a heavy wind that was coming from the right front. It was the only time that I couldn't tow in overdrive and the fuel consumption was the highest of any time that I owned the van. I had a Ford Explorer pulling a U-Haul pass me on my left and I was ready for when he came up to the leeward side of our trailer. Sure enough, he suddenly lurched right and I had to hit the shoulder of the Interstate to keep him from hitting me.
One amusing occurrence was when a guy on a motorcycle passed us. He was laying over at about a 30 degree angle but was going straight down the Interstate.
