I dont care if they call me a liar, i am just reporting what my truck does. And yes 63 average, that includes stopping for fuel, getting off interstate and the highway between Spanish Fork and Price is slower. 75-80 was on interstates of which majority of trip was. Go ahead and pick me apart as i dont care, the info is for the people on here that care about how a truck might do that they might buy. For me i just stop and put fuel in when it needs it and not really worried about what it gets. For the record i am happy with this truck so far.