I'm just joining the various RV forums so I could answer questions like these. My wife and I purchased a travel trailer this past year and it was hard to find good information. Our trailer is a Travel Lite i16 Idea Cobblestone which is 3000#. We tow it with a 2013 Dodge Durango V6 and our gas mileage usually runs between 14 and 16 mpg. When we are bucking the wind trying to maintain 60mph, it has dropped as low as 12.5. When we are with the wind at 65mph we have easily reached 17. This past summer, we took it out west from Wisconsin to Wyoming. Overall average going out was about 14.8. Overall average coming home was 16.4 - we had wind behind us most of the way. Hope this helps some people make their decisions.