Urggh....only 9.8mpg towing. But a solid 15mpg unloaded around town, and 18mpg on the highway. My Toyota Tundra V8 got 12.5mpg towing, but strangely the same as the Hemi unloaded. But I love the truck. Handles great, looks great, brakes well(much better than Tundra with a load on), comfortable, and I plan on having it a long time. For real heavy use, I can see why some go for the HD w/ diesels to save some fuel, but I don't mind paying extra for the acceleration and quiet. (0-60mph in 6.8 sec according to Motor Trend).