I tow a Hyundai Azera on a dolly, adding 4500 lbs, or about 20% of my original coach weight, so I notice a difference when starting and stopping, but once you are rolling, there isn't much of a difference. In order to accommodate for the difference when starting, I take a lot longer to get up to speed. It saves the engine and gas mileage. When stopping, I take a lot longer to slow down and I coast as far as possible by allowing much more room between myself and the next vehicle if front of me. Also, try to keep your eye on the road as far away as possible, a ? mile if you can, rather than just on the car in front of you. This will give you a lot more time to slow down and stop rather than having to make quick stops that eat up your mileage and brakes.
