I drive a 2019 Ram 1500 classic crew cab with the short box, V6, and 3.21 gears. It is 2 WD. A Tradesman. Basic truck. I've only driven it a little over 12,000 miles and the mileage has gone up from about 20 mpg to a cumulative mpg of 23.3 mpg at the moment. I keep a notebook in each of my vehicles and write down the odometer reading, gallons, and cost (and date) each time I fill up. So my mpg is from my resulting spreadsheet. I haul things sometimes but have not yet towed anything with my truck. Individual tanks have indicated over 25 mpg but I don't put too much weight in that, different pumps shut off at different times. Sometimes I look at the average of the last 3 tanks to try and average this out. But the cumulative mpg (total mines divided by total gallons) seems the most significant to me. Mine went up initially but seems to have plateaued. I've made two trips of a thousand miles each way but the rest of the miles have been relatively short trips of a hundred miles or less.