Just got a legitimate 700 miles/tank yesterday. 701 on trip, 1 mile to empty. Went another 11 miles to gas up, and filled just under 16.5 gal. New tank to empty is 754 miles. 90 miles daily commute, freeway, highway mostly, surface streets about 20%. I live at 2800 feet, commute to 800 feet. Generally so far, 63 mpg going in, 40 mpg coming home. However, long term shows around 44 mpg. Used to fill up twice a week with my Mazda 6 (4cyl), now once every 7 to 8 days. Awesome, really, really awesome.