ethanol question

On Sat, 14 Jun 2008 01:37:40 -0400, "Peter Dohm"
wrote:
..

There is no question regarding the fact that the ethanol solution as a farse
and a fraud, and there is also no doubt that it is less efficient. But you
certainly do not need 50% more fuel--the worst number that I have heard is
10% and simple chemistry suggests a worst case of 4% if the maximum dilution
of 10% ethanol is used.

I was talking ethanol powered - deepo six the gasoline completely.
Further, there is considerable doubt that
automotive fuel tanks are presurized in any meaningfull way--from all that I
have heard, they have sealed filler caps and any "breathing" occurs through
the evaporative emission controller.
They hold about 3-5psi

OTOH, crank induction two stroke engines are another matter. There are
already intollerant of premixing the oil too far in advance and, from all I
have heard, the addition of ethanol adds fuel system clogging to the
problems. That sounds like really bad Mojo!

The biggest problems, other than certification, are probably:
1) A lot of fiberglass fuel tanks were allegedly marginal with straight
gasolene, and are untested with E10.
2) Long term storage of E10 may untested, in documented and controlled
testing, and the oil companies supposedly don't attempt to store
E10--instead any ethanol is allegedly added as a final step prior to retail
delivery. The horror stories that I have heard, involving 4 stroke engines,
have involved lawn and garden equipment which sat idle for long periods.

Personally, I really doubt that it is a big problem in the case of frequent
use with filler caps in good condition. But, at this time, I think it makes
more sense to buy Avgas whenever undiluted Mogas is not currently available
from the FBO.

Peter



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