2001 Chinook Concourse XL - E350 V10 DRW, 9,500lbs, only had for short time but on 18 hour drive back averaged 10.5mpg at an average 68mph. Normal driving getting between 10.5 and 11.3, depending on road - (readout from ScanGuage II).
2014 Jeep Grand Cherokee Overland, V6 Pentastar, 140k...