Half a croissant, on a plate, with a sign in front of it saying '50c'
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Onboard Gasoline Distiller & Mixer

Use the perfect fuel mix for every situation.
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Gasoline is not a pure chemical -- it is a blend of an assortment of hydrocarbons, specifically selected to be the least costly mix to produce while still meeting some set of specifications.

Furthermore, those specifications aren't ideal for all situations -- the most cost effective fuel blend for cruising would result in knocking when you want to drive up a hill.

This idea is a way to let the engine use the ideal fuel for every situation, by mixing the fuel on the fly.

We start with a rigid fuel tank (metal, carbon fiber, etc.) with flexible divisions (plastic bags, perhaps) inside it, with each division containing a different fuel component.

As driving conditions change, a fuel mixer chooses different proportions of the fuels in those divisions.

The fuel components would be produced by a small, exhaust heat powered, gasoline distiller, whose feed stock is gasoline from the gas station.

It's perfectly acceptable if the distiller doesn't separate the all of the components of the gasoline precisely -- merely dividing the fuel into three or four densities should suffice should suffice to improve fuel economy, emissions, and peak horsepower.

goldbb, Aug 31 2011

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       You know, I can't help thinking...oh, wait. Yes I can.
MaxwellBuchanan, Aug 31 2011
  

       Sure but what do you do with the leftovers ? [+]
FlyingToaster, Aug 31 2011
  

       When [MaxwellBuchanan] thinks, there are no leftovers. He uses it all.
normzone, Aug 31 2011
  
      
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