Date: Sat, 24 May 2008 16:29:32 -0700
Reply-To: Roger Whittaker <rogerwhitt1@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Roger Whittaker <rogerwhitt1@GMAIL.COM>
Subject: Re: Snake Oil or Legit?
In-Reply-To: <ee935e050805241347n73bb3997sc49925c9f29dedbe@mail.gmail.com>
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to those considering this
looks like repackaged cetane additive ...
which is always a good thing to add to the low sulfur fuel ... but ...
then arent we bucking the lower emission trend ...
(my dog is named toto not kyoto ...;o)
additives of any sort should be researched a little before use ...
and the need you have for it should be researched the most ...
why are you wanting this ..
cold start help ???
to pass an emissions test with an old tired motor ???
to give your machine better MPG results ???
anyway ...
i think the bottom line is contained in the middle line
where it claims to increase cetane in diesel engines
Increases cetane in Diesel Engines;
of course the writer ... meant that it would increase volatility in the
diesel fuel
see the information at http://www.superfuelsaver.com/Cetane%20Booster.html
*What is Cetane Number?*
- *Cetane Number is a measure of the ignition quality of a diesel fuel.* It
is often mistaken as a measure of fuel quality. Cetane number is actually a
measure of a fuel's ignition delay. This is the time period between the
start of injection and start of combustion (ignition) of the fuel. In a
particular diesel engine, higher cetane fuels will have shorter ignition
delay periods than lower cetane fuels.
- *Cetane number should not be considered alone when evaluating diesel
fuel quality.* API gravity, BTU content, distillation range, sulfur
content, stability and flash point are also very important. In colder
weather, cloud point and low temperature filter plugging point may be
critical factors.
*Determining Cetane Number*
- *The optical method for determining cetane number is ASTM test D-613.**
*This method requires the use of an industry standard test engine
equipped with accepted instrumentation and operated under specific
conditions. In this test, the engine compression ratio is varied for the
test sample and reference fuels of known cetane number to obtain a fixed
ignition delay. The compression ratio of the sample is bracketed by those of
two reference fuels. The cetane number of the sample fuel is determined by
estimating between the two reference fuel points.
- *Because the ASTM D-613 test* is time consuming and expensive,
calculated cetane index (ASTM D-976 or D-4737 is often substituted for
cetane number. The calculated cetane index is derived from the fuel's
density and boiling range. While useful for estimating the cetane number of
distillate fuels, this technique can not be applied to fuels containing
additives that raise cetane number. These additives do not change the fuel
density or distillation profile, so they do not alter the calculated cetane
index
--
roger w
There are two kinds of jobs in the world:
Picking up garbage and telling people things.
Successful people do both, with the same good attitude. (riw)
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