I think it is fair for Tesla to put that in. Many people start off car shopping by comparing monthly lease amounts for a range of cars to figure out what is in their price range. However, at this high level overview, it can be easy to forget to factor in items such as gas into the monthly cost.

Tesla marketing is simply doing their job and making sure consumers don't forget to add the price of gas to gasoline cars, by making a point of subtracting it from their car.