I can't speak for the nitrogenized gasoline, but I started using Shell
several years ago, based on their cleaning claims. I discovered that
whatever it was, Shell gas was cheaper to run than other fuels.
I started with a few tanks of their Ultra, with extra cleaners, to get
things clean (this was a 94 Lexus with 130K miles on it). Then I
switched to their 87 octane, and ran nothing but that. I was getting
better mileage than I did on other fuels, and even accounting for the
fact that the Shell was a bit more expensive to buy, it was cheaper to
go figure. I think their claims are legit--but they were so even before
claiming this "nitrogenized" fuel.
i started keeping fuel logs a few years ago, and indeed, averages for
shell are better than chevron, the other one i've run extensively.
but i have no idea about this nitrogen thing though. some interesting
blog comments here:
Hm, interesting. And I thought Chevron was the way to go.
I hope it's not a kind of gimmick like those claims about magnets around
fuel lines. ;-)
I noticed though that Shell also uses up to 10% ethanol in its gas which
is said to reduce fuel efficiency, so it's even more puzzling how they
can achieve better overall milage than other main brands.
Point taken. I better check the posted label more closely next time at
gas stations. Perhaps Arco's label does say 10%. I'm actually surprised
that government allows such vague labeling as "up to 10%." What might be
next? This gasoline's octane rating may be up to 89?
I can't see how any sort of dissolved free nitrogen would do squat for
cleaning. I'd think that the air would provide plenty... ;)
Shell's site is full of typical idiot-level Dancing Bologna and says
nothing of consequence.
Amines have long been used in the better anti-deposit additives.
Although a very complex family of compounds, all amines use a nitrogen
atom as a foundation. http://en.wikipedia.org/wiki/Amines This is
hardly bleeding edge tech...
I suspect nothing is new, except for the dumb ad campaign. (OK, maybe
they increased the amount of 'stuff' in their mix by 2%...)
We discussed this extensively on an RV newsgroup and came to pretty
much the same conclusions. Nitrogen gas is going to do nothing and the
Shell website about there new gasoline is almost completely free of
Several knowledgeable posters suggested it was probably just an
additive -- probably a nitrogen compound such as nitrotoluene or
nitrobenzene. These can act as powerful solvents and also would tend
to raise the octane number.
Itinerant astronomy teacher
On Sun, 15 Mar 2009 14:38:23 -0500, Elliot Richmond
Why do you think 'nitrogen' means nitrogen in a gaseous form? The
facts are you have no idea what you are talking about. Sure, Shell
does not reveal what nitrogen based additive is the basis of their
claim but that does not make their claim invalid. Until you have some
facts to share, why not keep quiet?
On Mon, 16 Mar 2009 06:21:35 +0000, Edward W. Thompson
When one says "nitrogen." that's what one means. Nitrogen is an
element. In gaseous form and standard temperature and pressure, it is
a molecule formed of two nitrogen atoms joined by a double covalent
bond. In this form it is relatively unreactive. The atmosphere is
about 78% nitrogen.
I have some idea of what I am talking about.
They did not say nitrogen based additive, they said "nitrogen
Here is a tinyurl link to their page supposed "explaining" this new
I could not find any use of the words "nitrogen based additive" or
"nitrogen compound" or "nitrogenated hydrocarbon."
My guess was clearly speculation. Having facts and keeping quiet have
never been standard operating procedure for Usenet. It certainly has
not hindered anybody posting to this group in the several years I have
been reading it, and occasionally contributing.
However, I stand by my guess of nitrobenzene or something similar.
Nitrobenzene is an effective solvent, it is relatively inexpensive, it
mixes with water and gasoline, it would raise the octane number, and
is not known to be carcinogenic.
Itinerant astronomy teacher
The Houston Chronicle quotes Shell this way:
"Nitrogen is a key element of the active cleaning molecule in the new fuel,
making it significantly more stable at higher temperatures common in modern
engines, such as direct fuel-injection gasoline engines. The increased
stability ensures that the molecule can work under much tougher engine
conditions by resisting thermal breakdown better than conventional cleaning
To me, this says the additive they're talking about CONTAINS nitrogen, not
that it IS nitrogen.
On Mon, 16 Mar 2009 10:53:16 -0500, Elliot Richmond
Do you seriously think that Shell lintend to mislead by claiming they
have some 'magical formula' to fix gaseous nitrogen in gasolene?
Incidentally the information on nitrogen was not necessary :-) but
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