[Diy_efi] Is E85 worth it?

[Klaus Allmendinger]

Steve,
 
I will be back in the office end of next week (I'm on vacation right now). I will post the sources (if I remember). 7 gallons per gallon of ethanol is FAR higher than even the most pessimistic study found. The number I used is from a very thorough study by the US department of Energy using data from 2000-2004 for production yields, fertilizer usage and fertillizer production yields. Independent other studies came to about the same conclusion.
Piementel et al have done the most pessimistic studies, but used input data from the 70's for part of their calculations.
 
 
 

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If you don't mind, I'd like to see the sources you have studied, because
what I've read is far in the opposite direction, like 7 gallons of
petroleum to produce 1 gallon of ethanol.

All resources are finite.  The price of most fall with time, and the
availability of most increase with time, due to increased efficiency in
use and production.  The price of oil and gasoline would certainly
follow this trend if they weren't interfered with politically.

Human production of CO2 at about 5 gigatons per year is a tiny fraction
of the CO2 already in the atmosphere (over 700 GT), and dwarfed by the
carbon transport mechanisms between atmosphere, surface ocean, marine
biosphere, land biosphere, and deep ocean.

--steve


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