A very interesting thread indeed, but I'm afraid the problem is much more complex then that.
Only about a third of crude is being refined for the use of propulsion of some sort (air, land and sea) Obviously, if we have no more fuel we have no means to power our conventional propulsion systems. Not only that, but think about lubricants. Sure, Skydrol is synthetic and many other lub's and greases are synthetic nowadays, but in order produce those synthetics we need chemicals.
Now another third of crude is being refined for medicine, chemicals and composite material such as plastic and rubber etc. Look around in your cockpit, galley, office and home. Lots of plastic-fantastic, rubber and other crude refined materials or derivatives. Take for example your standard XY ballpoint pen – everything but the metal tip (including the ink) is a crude derivative of some sort. Your clothing, your paint on the wall, your medicine and for your ladies the make up too just to mention a few.
The last third is used for the production of heat for private homes, industries power plants etc.
So if and when we run out of crude we'll be cold and miserable with reduced capacity of movement and a much reduced standard of living altogether. Even if we could theoretically power an aircraft with ethanol or nuclear reactors we'd still need lubricants, rubber and composite materials. I think all in all, not much will work once we run out of crude.