(JAXAshby) wrote in message ...
here you, yo-yo. http://www.encyclopedia.com/html/o1/octanenu.asp

an explaination even you can understand as to what the "octane rating" of
octane is.


Here are some lines from that link that are pertinent:

"The engine is next operated on a fuel blended from a form of
isooctane that is very resistant to knocking and a form of heptane
that knocks very easily. When a blend is found that duplicates the
knocking intensity of the sample under test, the percentage of
isooctane by volume in the blended sample is taken as the octane
number of the fuel."

It's a classic neophyte blunder, confusing octane (spec. normal
octane) for isooctane. It seems your understanding of gasoline engines
and gasoline is at best cursory or dated. I practically begged you,
twice, to look up octane ratings for normal octane and iso-octane. Had
you done that, you'd have realized that the octane rating of normal
octane is less than zero.

You'll note that I have been very careful to distinguish between
normal octane and iso-octane. You apparently have yet to understand
the distinction and its significance. Here's another link that may
help you in that quest:

http://www.chevron.com/prodserv/fuel...#octane_number

There are plenty of other pages on the web which contain great
information on the topic. See if you can locate Bruce Hamilton's most
recent Gasoline FAQ. Indeed if you just poke around the rest of the
http://www.chevron.com/prodserv/fuel...etin/motorgas/
site a bit you could learn other tidbits about other gasoline and
engines.

I have seen you deride others for researching topics on Google or for
using cut-and-paste, as if your hastily jotted recollections were more
authoritative. Do you not see the hypocrisy when you cut-and-paste a
definition from a dictionary or cite a link from an online
encyclopedia that you have apparently not digested? I have been
embarassed on your behalf that anyone could actually provide superior
information, having known nothing of the subject at the outset, by
applying techniques of research that you could easily do yourself.

Even the most intelligent do not remember everything. Legend has it
that Einstein did not remember his own phone number, but he did know
where to look it up. Great minds do very well by retaining a scaffold
of information and by referring to the literature to fill in the
details when they are addressing a problem. When they speak, it is
usually after they have already brought themselves up to speed. When
they are disputed, they doublecheck and provide authoritative
references that actually support their position, or they confess their
simple misunderstanding and move on. They recuse themselves from
strongly opining on subjects in which they are not expert, and they
know what those subjects are.

And they ask questions. When you asked "wtf???" it was a good start.

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the octane rating of normal octane, ... is, less than zero.


wtf???

That is correct. Less than zero. Less than the rating assigned to
normal heptane.

I gave you a big hint when I said to look up octane numbers for
"normal octane", "normal heptane" and "iso-octane" (a.k.a.
2,2,4-trimethyl pentane).

Here's another hint (in form of questions): which is better as diesel
fuel, octane or cetane? Which has higher octane number, heptane or
propane? Can we make any generalizations about long vs. short chain
alkanes and their branched isomers?

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