QUOTE (arden @ May 15 2006, 12:55 PM)

sounds to me like the first person to introduce one of these designs would be a billionaire..
Well, maybe, maybe not. It does seem to add up though. Diesel is already more energy efficent than gasoline (more energy per liter--
source), in the order of up to 18% more efficent. That means, you'd get 18% better MPG if your car ran on diesel, and nothing else was different.
It's also easier to refine. Much easier. Gasoline is more difficult to distill, no matter the octane. The problem we're facing in the US is that we have pretty crappy diesel. It's got a high sulfur content, which is akin to "leaded fuels" of yesteryear. The sulfur provides a necessary lubricant, and ULSD (Ultra-Low Sulfur Diesel) requires additives to do the same. However, we don't get to have the sexy European autos until we have ULSD. You know what else has the lubricity of US diesel, or ULSD+additives?
veggie oilNearly any diesel will run straight from vegetable oil, if heated before being drawn from the fuel tank. Pass methanol through it, and the glycerin in the oil will precipitate out, leaving a much thinner biodiesel. It is a drop-for-drop replacement (actually, it's 5% more energy dense than normal diesel ... another 5% more MPG for "free"). Turbocharging diesel engines makes a lot of sense as well, because they are already high-compression by nature, and diesel can't knock because of how it's injected.
We always hear "blah blah foreign oil dependencies". There is enough dead space in this country that we can grow vats of algae which are specifically bred to produce massive quantities of vegetable oil. Think of all the space that we're already budgeting for growing surplus corn, to turn into ethanol, which is a flawed concept. Ethanol requries more energy in, to produce a gallon of fuel, than that same gallon will provide to any vehicle. In addition, billions are spent in government subsidies to encourage farmers to grow more corn, which reduces the amount of space available for livestock. As such, consumers see a hard hit in the wallet at the supermarket on meaty items. Like meat.
We can produce all the oil we need from within the 50 states we own, and for hundreds of years to come. There is nothing wrong with using dino fuels, provided we use them at a reasonable rate. Let technology mature before dumping billions into misguided research on futuristic technologies.
Stop giving tax breaks to people buying SUV's! (
source). What hurts us as a nation is trying to tear down our entire fuel infrastructure and put something new in its place -- like hydrogen. California and Oregon have already begun the process, and the whole architecture has to be ripped up and rebuilt. We already know how to ship diesel, we're just abandoning this time-tested technology.
*tips a 40 of heating oil into the curb*

And here's for some very expensive lives in the future ...