I did the math dozens of times. My Ram would be generous and give me an additional .5 mpg consistently. The numbers I quoted were actual mileage and I assume many others of all makes considered this too. Most folks know not to trust the truck gauge.I own a ram and my computer tells me how great my MPG are. Unfortunately, Ram's computer is off by 2-3 MPG on average. I have confirmed this with 4 other 2014 and newer rams and ALL 5 of our vehicles are off by 2-3 MPG. Newer Ram owner's do the math next time you fill up, ( preferably at the same pump) and I am sure you will be disappointed.