I live/Ride in houston, which means tight woods and MX (street once I get my reg done). I get about 20-25 MPG in these highly un-economic conditions. Next week, I go to Terlingua for my first desert experience and have no idea what to expect for mileage. It matters because I need to know I can go at least 60 miles on a stock tank of gas. Any numbers from you desert guys? Terlingua will be mainly on roads/trails that a good SUV could negotiate. the altitude varies from 2000' to 5000'.