my gas mileage idea

Recently the EPA revised the way they calculate a vehicles estimated highway and city mpg. It's down a significant amount, and these real world numbers are very important.

Here's my idea:

Let's require all vehicles sold in the United States must have a miles per gallon read out. Our hybrid, of course, has this feature - because Honda actually want us to see how great we're doing saving gas (latest tank is 48 mpg). But if we require it on all vehicles people would actually see how bad their gas mileage is.

And I know drive more slowly just because I know it will help me get better gas mileage on the hybrid. Therefore, this would also help with safety.