Welcome to the group. If you are not familiar with hypermiling techniques (fuel efficiency ) , look for post from individuals such as gpsman1 and Gary G. There is a wide variety of skilled individuals that contribute to this site and many of us--such as myself--have to thank the well educated posters for contributing to this forum.

2005 AWD Escape Hybrid
Best Interstate tank trip MPG 39.02 (scangauge II) for 402 miles on I-70, 10.3 gallons used over mostly flat terrain.

Best Interstate tank trip E30 MPG 34.6 for 271 miles along I-80 in Indiana and Ohio.

Best multiple road tank trip E30 MPG 36.2 for 202 miles in Southwestern Pa.