28 is good for these cars but when you think about other vehicles it is not that good. If I baby mine on a sweet summer day my 76 300D might do that if I say please. I also have a 2004 Dodge ram 2500 with the Cummins Diesel, this vehicle weighed 6700 lbs from the factory with no options, if I travel at 70 mph winter or summer I will usually range from 18-21 mpg if I am unloaded. I am comparing 2 different beasts here but for a 7K lb truck that is not very aerodynamic to get 18-21 at 70 is alot more efficient than a car weighing 4k at 70 mpg getting 28 mpg. Than I think about semis and I start to feel sick, because a semi maxed out at GCVW is around 80K and they will get 6-9 most of the time. Think about the efficiency there with that weight and aerodynamic drag, shouldnt my truck weighing around 1/4 the semi (my gcvw is around 21K) both at gcvw and my truck having at least 1/3 less aero drag wind resistance I now get around 6 mpg if I operate at gcvw shouldnt my truck get 24 mpg + if they ran at the same efficiency ? Food for thought.