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Brian Whatcott

On Mon, 05 Nov 2007 02:15:26 GMT, (Richard
Casady) wrote:

It happens that propane, as well as both alcohols, methanol and
ethanol, have an octane rating of 100. There is no reason not to
expect better efficiency and more power, compared to gasoline.The
carburetor designer's job is easier. You can realistically expect to
get the same near ideal mixture to all the cylinders. The perfect
fuel, actually.Historically, propane has been cheaper and there were
engines around that could use the octane..

Casady...

Hmmm...the unspoken implication is that high octane implies high
energy content. It doesn't however. It's a common place that 90
octane can have higher energy content than 100 octane.
The high test stuff has better anti knock properties however, so
higher compression can provide better thermal efficiency using that
lower energy content fuel.

Brian Whatcott Altus OK