Took the smart for its first long distance trip - 400 miles to/from Tucson. My first commute to work produced great mileage on the way in today (58MPG), about 10% increase over most days. Did not do anything different as far a hypermiling. Could this be the result of the long trip? At this rate may hit my first 500 mile tank, currently at 56.7MPG with about 9gal tank.