In my post yesterday about unrealistic MPG standards, some readers reminded me about diesel.
Yes, they are right. Diesel engines are up to 30% more efficient than gasoline engines, and it's possible to build a small car with a high-tech diesel engine that can actually meat those fuel standards.
So how come no one is talking about diesel? Environmentalists dream of pie-in-the-sky technologies like electric battery-operated cars which will completel replace fossil-fuel-powered cars, even though these technologies have not been demonstrated to ever be practical. Meanwhile, the proven technology of diesel is so under-the-radar that hardly anyone even knows about its fuel economy advantages.