In other words you made a naked assertion based on nothing. I guess that's as close to an admission of guilt as we'll get from you.
As the velocity of the car approaches its top end, its MPG will degrade rather quickly. Do you wish to dispute that?
Why would I? The topic was cars that get better gas mileage at 70 than they do at 55. Some of the old women on this thread wished to dispute that as a possibility. General discussions of physics beyond that are completely uninteresting to me.
So, what would be your point in arguing with me? This stumps me. I have already admitted that my opening statement was not well crafted. That does not diminish the physics behind the entire conversation or the fact that it requires more horsepower to achieve higher speeds in all cases. Some cars have better aerodynamics, more efficient and powerful engines, and are optimized for different speed ranges. Some vehicles carry concrete.
What point are YOU trying to make?