Here's all you need to know about mileage standards

Between the 1974 oil crunch and Ronald Reagan, the average efficiency of the US auto fleet increased 60%, and horsepower dropped slightly. Since then, horsepower has increased 60%, and fuel efficiency has dropped slightly.

When automobile manufacturers whine that better efficiency is impossible, think about where we would be now if all of the engineering genius that has gone into more power had continued to focus on less waste.