I drive 110 miles RT to work. Now that my kids are out of the carpool stage I was able to trade in my Taurus wagon -- which was a great car on everything except mpg. I bought a Prius last year -- I average 48 mpg without much change in my driving habits. I save about $150 a month in fuel costs compared to the Taurus -- which brings the effective car payment to about $150 month. That made the Prius one of the cheapest cars I could buy in real dollar from day one. I know a small car won't work for everyone, but it seemed like a reasonable choice for me. I don't yet know the mileage while towing the boat.