I've been getting about 350+ or so a tank during normal driving, however, I filled up in Long Island last night and only used a 1/4 of a tank getting back up to CT. Car is like driving a damned automatic with 6 gear. Just leave it and drive. The trip computer said I'm up to 22.5 avg. We all know it's off, but that's what it registered since buying it 2 weeks ago.