On Tue, 27 Jul 2010 09:27:03 -0700, Mark Borgerson
wrote:

It is not all that difficult to remove alcohol from gasoline. Just add
maybe 20% waterand shake well. Then pour off the upper gasoline layer
and discard the lower
water layer that has all the alcohol in it. Get the local fuel dealer
to drop off a 300 gallon barrel. You can add the water and stir with
compressed air, then drain the water.

Will that change the effective octane rating of the remaining gasoline?
Ethanol, and the methanol my car uses, propane, acetone, toluene they
all rate 100 octane. If you take it out it will lower the octane three
points or so to the level you have with the upblended gas sold as
such.

Casady

In article ,
says...
On Tue, 27 Jul 2010 09:27:03 -0700, Mark Borgerson
wrote:

It is not all that difficult to remove alcohol from gasoline. Just add
maybe 20% waterand shake well. Then pour off the upper gasoline layer
and discard the lower
water layer that has all the alcohol in it. Get the local fuel dealer
to drop off a 300 gallon barrel. You can add the water and stir with
compressed air, then drain the water.

Will that change the effective octane rating of the remaining gasoline?
Ethanol, and the methanol my car uses, propane, acetone, toluene they
all rate 100 octane. If you take it out it will lower the octane three
points or so to the level you have with the upblended gas sold as
such.

I think modern engine controllers will cope with that without problems.
With knock detection and flexible spark timing it shouldn't be a
problem. An older engine that needs premium fuel might have
some problems.


Mark Borgerson