Filled up the 2003 Civic EX 1.7 today. Last fill up was exactly 2 weeks ago. Drove 336.2 miles in that time and used 11.439 gals for an average of 29.4 mpg. My driving is a mix of local and highway, but keep in mind I almost never drive more than 15 miles in one direction. Typical drive is ~5 miles with about 3.5 of those miles on a 60 MPH bypass.