Yes, really! I just did 400 miles between fillups last month. Took a road trip from Sumter to Kiawah Island, S.C. and back again and then running around town. The "sweet spot" for my Xfire is 2400 rpm on the open road. "The Silver Bullet," as I call my Xfire, has delivered as much as 33 mpg on most of our road trips. For example, one trip I went from Sumter to W. Va. up I-95. I left here with a full tank and pulled into a gas station at that end with 405 miles on my trip odometer and about a gallon and a half left in the tank.