Yeah, the oil companies and Bush are behind the lack of development of alternative energy. And they've got those 200MPG carburetors all packed away in a warehouse in Texas too.
Alcohol, be it methanol or ethanol, does not have the BTU content necessary for use as an efficient motor fuel. It also requires very high compression ratios in order to be nearly as efficient as hydrocarbon fuel. In fact, most alcohol has about HALF the BTU content of hydrocarbon fuel. Further, the high compression ratio needed to burn alcohol efficiently produces nitrides of oxygen, which is a top pollutant on the EPA list.
Theoretically, if you could get the distribution network setup , we could switch to alcohol, provided you were willing to stop twice as often to fill up. It could also be used to cut bio diesel, adding alcohol in the proper percentages will make your diesel kick ass. However, vehicles built to use alcohol could not be run on gasoline in an emergency, because the gasoline required would be 110 octane. Alcohol is also EXTREMELY hard on fuel systems, it is very corrosive and removes the plasticizers from rubber components.
We could also cease to use petroleum based lubricants,and switch to pure synthetics. This is actually very feasible and has far more advantages than the minor disadvantage of cost.
We could also go to almost 100% nuclear generated electricity, with the rest produced from hydroelectric plants. Then use the coal like the Germans did in World War II, and make gasoline and diesel from it. They did it 60 years ago, I'm sure the process could be refined and improved.