One can "laterally bump" the vehicle to remove more air from the tank for additional fuel. This refers to pushing the vehicle side to side and waiting for the fuel drop down further into the tank. There is a diminishing return for this manuever and don't try this when the station is busy.

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. Aug. 2007

Best Interstate tank trip E30 MPG 34.6 for 271 miles along I-80 in Indiana and Ohio. May 2008

Best multiple road tank trip E30 MPG 36.2 for 202 miles in Southwestern Pa. July 2008.